Half-life. Investigate the decay of a radioactive substance. The half-life and the number of radioactive atoms can be adjusted, and theoretical or random decay can be observed. Data can be interpreted visually using a dynamic graph, a bar chart, and a table. Determine the half-lives of two sample isotopes as well as samples with randomly ...Name: Date: Student Exploration: Nuclear Reactions Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain …Student Exploration: Nuclear Decay Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The chart below gives the locations, charges, and approximate …Student Exploration: Nuclear Decay. Vocabulary: alpha particle, ato mic number, beta particle, daughter product, gamma ray, isotope, mass nu mber, nuclea r decay, positron, radioactive, subato mic particle . Prior …nuclear decay. The decay of radioactive atoms generally results in the emission of particles and/or energy. Several types of nuclear decay can be explored with the …Student Exploration: Nuclear Reactions. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.]Allison Soult, Ph.D. (Department of Chemistry, University of Kentucky) 11.4: Nuclear Decay is shared under a CC BY-NC-SA 3.0 license and was authored, remixed, and/or curated by LibreTexts. Unstable nuclei spontaneously emit radiation in the form of particles and energy. This generally changes the number of protons and/or neutrons in the ...Name: Date: Student Exploration: Nuclear Decay Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle Prior …Student exploration nuclear decay answers Click-reset-and-turn-off / BetterLesson students are introduced to the concept of radioactive decay by a ExploreLearning Gizmo. ExploreLearning: get hands-on, minds-on math and science observe the five main types of nuclear decay: alpha decay, beta decay, gamma decay, positron emission, and …Name: Date: Student Exploration: Nuclear Reactions Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain …When a nuclear reaction occurs, the total mass (number) and the total charge remain unchanged. 21.2: Patterns of Nuclear Stability. Protons and neutrons are called nucleons and a nuclide is an atom with a specific number nucleons. Unstable nuclei decay spontaneously are radioactive and its emissions are called radioactivity.You get paid for the hard work you already executed. It's more fun than the average student side job. If you become a top seller, you might even be able to quit your side job! Earn money by uploading study guides, checking theses, delivering translation work, or help students differently by adding a free document.Student Exploration: Nuclear Reactions [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain reaction, CNO cycle, catalyst, deuterium, electron volt, fission, fusion, isotope, nuclear reactiThe atomic number of an element is equal to the number of protons in each atom of the element. All helium atoms have 2 protons. What is the atomic number of helium? _ 2 ____ Gizmo Warm-up While most atoms are stable, some are radioactive, which means that they have a tendency to undergo spontaneous nuclear decay. The decay of radioactive …You get paid for the hard work you already executed. It's more fun than the average student side job. If you become a top seller, you might even be able to quit your side job! Earn money by uploading study guides, checking theses, delivering translation work, or help students differently by adding a free document.nuclear decay. When a nucleus undergoes a nuclear reaction and emits radiation. positron. A particle with the same mass as an electron but an opposite charge. radioactive. The tendency to undergo nuclear decay. subatomic particle. Particles smaller than an atom. Eg: protons, neutrons, electrons. It's simple and straightforward to make extra cash as a student, just upload your notes to us and we'll handle the sales side and pass the money back to you. Docmerit offers the highest payout ratio: you earn up to 85% per sale. We transfer the money to your bank account within 24 working hours.Student Exploration: Nuclear Reactions Introduction: All stars turn hydrogen into helium in a process called nuclear fusion. Stars perform this process in different ways. In stars like our sun, the proton-proton chain is used. This reaction requires temperatures greater than 4,000,000 K to occur. Student Exploration: Nuclear Reactions. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Name: Date: Student Exploration: Nuclear Reactions Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain …Student Exploration: Nuclear Decay. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle ...8. Explore: Use the Gizmo to explore whether the number of atoms present affects the half-life that you measure. Describe your findings below: _____ _____ _____ _____ 9. Extend your thinking: The slow decay of radioactive materials can be used to find the age of rocks, fossils, and archaeological artifacts. In a process called radiometric dating,Name: Date: Student Exploration: Nuclear Reactions Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain …Jan 5, 2023 · Student Exploration: Nuclear Decay Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The chart below gives the locations, charges, and approximate masses of three subatomic particles. The approximate mass of each particle is given in universal mass units (u). Jan 21, 2024 · The Nuclear Reactions Gizmo simulates a particle accelerator. Particle. accelerators speed up atoms to very high velocities, then crash the atoms. together with enough energy to cause changes callednuclear reactions. There are three particle beams available in this Gizmo, protons, neutrons, and. helium-3 nuclei. JET researchers are exploring how to dispose of the low-level waste, as well as the much smaller amount of intermediate-level radioactive waste — in which nuclear …2321 Spring 2023 Syllabus-1 2321 Spring 2023 Syllabus-1 Math Block 4 Gage Kamper Percent of Change An-introduction-to-optimization-4th-edition-solution-manual compress …2. Energy. Matter and energy are ____ in a nuclear reaction. (The mass of the product is slightly less than the mass of the reactant). Interchanged. All nuclear power generation is accomplished through _______. Nuclear fission. The actual _____ of …The decay of radioactive atoms generally results in the emission of particles and/or energy. Several types of nuclear decay can be explored with the Nuclear Decay …Nov 1, 2021 · reaction, CNO cycle, catalyst, deuterium, electron volt, fission, fusion, isotope, nuclear reaction, positron, positron emission, proton-proton chain Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The chart to the right gives the isotope name, element name, number of protons, and number of neutrons of three isotopes. 1. What do you notice about the isotope number and the sum of ... Student Exploration: Nuclear Decay. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, radioactive, subatomic particle When a radioactive element undergoes a beta decay, its atomic mass remains the same while its atomic number increases by 1. For instance; Carbon-14 undergoes a beta decay to form nitrogen-14. The nuclear equation for the reaction is: 14 C 6----> 14 N 7 + 0 β-1. So, Beta decay does not affect the atomic mass of an atom but it …go down 2. Calculate: Turn on Write equation. What you see is an equation that shows the original uranium atom on the left. The boxes on the right represent the daughter product—the atom produced by radioactive decay —and the emitted alpha particle. A. In the top left box, write the mass number of the daughter product and press …Name: Date: Student Exploration: Nuclear Decay Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle Prior …Use the Add New button. Then upload your file to the system from your device, importing it from internal mail, the cloud, or by adding its URL. 3. Edit nuclear decay gizmo answer key pdf form. Rearrange and rotate pages, add new and changed texts, add new objects, and use other useful tools. When you're done, click Done.Student Exploration: Nuclear Reactions [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain reaction, CNO cycle, catalyst, deuterium, electron volt, fission, fusion, isotope, nuclear reactiName: Date: Student Exploration: Nuclear Decay Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The chart below gives the locations, charges, and approximate masses of ... Find Your Solution. Start playing, exploring and learning today with a free account. Or contact us for a quote or demo. Explore nuclear decay with ExploreLearning Gizmos! Students observe the five main types of decay and learn to write nuclear equations. Lesson plans included!When a radioactive element undergoes a beta decay, its atomic mass remains the same while its atomic number increases by 1. For instance; Carbon-14 undergoes a beta decay to form nitrogen-14. The nuclear equation for the reaction is: 14 C 6----> 14 N 7 + 0 β-1. So, Beta decay does not affect the atomic mass of an atom but it …Student Exploration: Nuclear Decay. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle ...Name: Date: Student Exploration: Nuclear Reactions Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain …Student Exploration: Nuclear Decay. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle A legacy of exploration. Radioisotope Thermoelectric Generators, or RTGs, provide electrical power for spacecraft by converting the heat generated by the decay of plutonium-238 (Pu-238) fuel into electricity using devices called thermocouples.Since they have no moving parts that can fail or wear out, RTGs have historically been viewed as a highly …Student Exploration: Nuclear Decay Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The chart below gives the locations, charges, and approximate masses of three subatomic particles.The approximate mass of …Pupil Exploration: Nuclear Decay Reply Key Exercise A. Highest energy kind of er. Particle location cost approximate mass proton. Worksheet Half Life Gizmo Reply Key Thekidsworksheet from thekidsworksheet.com Select the template you require from our library of authorized kind samples. On this course of, it emits a positron, which is.Name: Madison Johnson Date: 10/18/22 Student Exploration: Nuclear Decay NCVPS Chemistry Fall 2014 Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle Prior Knowledge Questions (Do these BEFORE using the …Nuclear decay. radioactive atom releases particles and/or energy. Positron. positively charged counterpart of an electron. Radioactive. capable of releasing radiation. Subatomic Particle. unit of matter smaller than an atom. Study with Quizlet and memorize flashcards containing terms like Alpha Particle, Beta Particle, Daughter Product and more. The best study notes and guides shared by your fellow students, organized in one place. Buy lecture notes, summaries and practice exams and get higher grades for your exams. Get high quality, verified notes from your school, professional course, or university. Summaries and study guides and tests are 24/7 online available.8. Explore: Use the Gizmo to explore whether the number of atoms present affects the half-life that you measure. Describe your findings below: _____ _____ _____ _____ 9. Extend your thinking: The slow decay of radioactive materials can be used to find the age of rocks, fossils, and archaeological artifacts. In a process called radiometric dating,Gizmo Warm-up While most atoms are stable, some are radioactive, which means that they have a tendency to undergo spontaneous nuclear decay. The decay of radioactive atoms generally results in the emission of particles and/or energy. Several types of nuclear decay can be explored with the Nuclear Decay Gizmo. number, nuclear decay, radioactive, subatomic particle Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The chart below gives the locations, charges, and …When a radioactive element undergoes a beta decay, its atomic mass remains the same while its atomic number increases by 1. For instance; Carbon-14 undergoes a beta decay to form nitrogen-14. The nuclear equation for the reaction is: 14 C 6----> 14 N 7 + 0 β-1. So, Beta decay does not affect the atomic mass of an atom but it increases its ...Student Exploration: Nuclear Reactions [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity …2019 Name: _____ Date: _____ Student Exploration: Nuclear Decay Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle Prior Knowledge Questions (Do these BEFORE using the Gizmo .) The chart below gives the locations, …Jan 15, 2023 · number will go down B. The mass number of the atom: the mass number will go down 2. Calculate: Turn on Write equation. What you see is an equation that shows the original uranium atom on the left. The boxes on the right represent the daughter product—the atom produced by radioactive decay —and the emitted alpha particle. A. In the top left box, write the mass number of the daughter product ... Name: Date: Student Exploration: Nuclear Reactions Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain …Popular books. Biology Mary Ann Clark, Jung Choi, Matthew Douglas. College Physics Raymond A. Serway, Chris Vuille. Essential Environment: The Science Behind the Stories Jay H. Withgott, Matthew Laposata. Everything's an Argument with 2016 MLA Update University Andrea A Lunsford, University John J Ruszkiewicz. Lewis's …Several types of nuclear decay can be explored with the Nuclear Decay Gizmo. On the Gizmo, check that Alpha decay and Uranium are selected. 1. Click Play ( ), and then …Student Exploration: Nuclear Decay Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle. 100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached.Alpha decay: The nucleus splits into two chunks, a little chunk called an “alpha particle” (which is just two protons and two neutrons) and a daughter nucleus with a lower atomic number than the initial nucleus.The “radiation” here is the small chunk, which generally moves away from the nucleus at a pretty high speed. Beta decay: There are two types of …Student Exploration: Nuclear Decay. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle Nuclear Decay. Observe the five main types of nuclear decay: alpha decay, beta decay, gamma decay, positron emission, and electron capture. Write nuclear equations by determining the mass numbers and atomic numbers of daughter products and emitted particles. Student Exploration: Nuclear Decay. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, ...Student exploration nuclear decay answers Click-reset-and-turn-off / BetterLesson students are introduced to the concept of radioactive decay by a ExploreLearning Gizmo. ExploreLearning: get hands-on, minds-on math and science observe the five main types of nuclear decay: alpha decay, beta decay, gamma decay, positron emission, and …What is the atomic number of helium? _____ Gizmo Warm-up While most atoms are stable, some are radioactive, which means that they have a tendency to undergo spontaneous nuclear decay. The decay of radioactive atoms generally results in the emission of particles and/or energy. Several types of nuclear decay can be explored with the Nuclear Decay ... Several types of nuclear decay can be explored with the Nuclear Decay Gizmo. On the Gizmo, check that Alpha decay and Uranium are selected. 1. Click Play ( ), and then …Name: Date: Student Exploration: Nuclear Decay Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, SPH4U Energy and Momentum - bmrohrlingb SPH4U: Energy and Momentum Course Website: HTTP://morning. yolasite.com This syllabus contains a list of all classes, topics and …Nuclear ReactionsSE - Free download as Word Doc (.doc / .docx), PDF File (.pdf), Text File (.txt) or read online for free. NUKELEARFind Your Solution. Start playing, exploring and learning today with a free account. Or contact us for a quote or demo. Explore nuclear decay with ExploreLearning Gizmos! Students observe the five main types of decay and learn to write nuclear equations. Lesson plans included!Radioisotope power systems, or RPS, provide electricity and heat that can enable spacecraft to undertake scientific missions to environments beyond the capabilities of solar power, chemical batteries and fuel cells. RPS are sometimes referred to as a type of "nuclear battery." While some spacecraft, like Cassini, do run their systems directly ...Student Exploration: Measuring Motion. (ANSWER KEY) Download. Student Exploration: Measuring Motion. Vocabulary: distance, speed. Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The speed of an animal is how fast it is moving. A speed of 6 m/s (meters per second) means that. the animal moves a distance …Half-life. Investigate the decay of a radioactive substance. The half-life and the number of radioactive atoms can be adjusted, and theoretical or random decay can be observed. Data can be interpreted visually using a dynamic graph, a bar chart, and a table. Determine the half-lives of two sample isotopes as well as samples with randomly ...Student Exploration: Measuring Motion. (ANSWER KEY) Download. Student Exploration: Measuring Motion. Vocabulary: distance, speed. Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The speed of an animal is how fast it is moving. A speed of 6 m/s (meters per second) means that. the animal moves a distance …Student Exploration: Half-life. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: daughter atom, decay, Geiger counter, half-life, isotope, neutron, radiation, radioactive, radiometric dating. Prior Knowledge Questions (Do these BEFORE using the Gizmo.)When a radioactive element undergoes a beta decay, its atomic mass remains the same while its atomic number increases by 1. For instance; Carbon-14 undergoes a beta decay to form nitrogen-14. The nuclear equation for the reaction is: 14 C 6----> 14 N 7 + 0 β-1. So, Beta decay does not affect the atomic mass of an atom but it increases its ... Name: _____ Date: _____ Student Exploration: Nuclear Reactions [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain reaction, CNO cycle, catalyst, deuterium, electron volt, fission, fusion, isotope, nuclear reaction, …Using Dice to Explore Radioactive Decay: In this activity, students will use dice to simulate the radioactive “decay” of samples of two different elements with two different half-lives. ... Activate students’ prior knowledge and engage them before they read the article., ...Student Exploration: Measuring Motion. (ANSWER KEY) Download. Student Exploration: Measuring Motion. Vocabulary: distance, speed. Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The speed of an animal is how fast it is moving. A speed of 6 m/s (meters per second) means that. the animal moves a distance …
When a radioactive element undergoes a beta decay, its atomic mass remains the same while its atomic number increases by 1. For instance; Carbon-14 undergoes a beta decay to form nitrogen-14. The nuclear equation for the reaction is: 14 C 6----> 14 N 7 + 0 β-1. So, Beta decay does not affect the atomic mass of an atom but it increases its ... . Oreillys belmont avenue
Nov 23, 2021 · Popular books. Biology Mary Ann Clark, Jung Choi, Matthew Douglas. College Physics Raymond A. Serway, Chris Vuille. Essential Environment: The Science Behind the Stories Jay H. Withgott, Matthew Laposata Student Exploration: Nuclear Decay Prior Knowledge Questions (Do these BEFORE using the Gizmo.) The chart below gives the locations, charges, and approximate masses of three subatomic particles. The approximate mass of each particle is given in universal mass units (u). Particle Location Charge...Name: _____ Date: _____ Student Exploration: Nuclear Reactions [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Vocabulary: chain reaction, CNO cycle, catalyst, deuterium, electron volt, fission, fusion, isotope, nuclear reaction, …The decay of radioactive atoms generally results in the emission of particlesand/or energy. Several types of nuclear decay can be explored with the Nuclear Decay Gizmo. On the Gizmo, check that Alpha decay and Uranium are selected. 1. Click Play ( ), and then click Pause ( ) when the alpha particle is clearly visible. Student Exploration: Half-life. Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: daughter atom, decay, Geiger counter, half-life, isotope, neutron, radiation, radioactive, radiometric dating. Prior Knowledge Questions (Do these BEFORE using the Gizmo.) Name: Date: Student Exploration: Half-life Vocabulary: daughter atom, decay, Geiger counter, half-life, isotope, neutron, radiation, radioactive, radiometric dating Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. Have you ever made microwave popcorn? If so, what do you hear while the popcorn is in the microwave? Popping kemels. 2. Gizmos Student Exploration|Nuclear Decay Lab Answer Key; The benefits of buying summaries with Stuvia: Guaranteed quality through customer reviews. Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.Gizmos Student Exploration: Nuclear Decay Answer Key. Gizmos Student Exploration: Nuclear Decay Answer Key. Name:_ Date: _____ Lab 8 - Nuclear Decay 2019 Name: _____ Date: _____ Student Exploration: Nuclear Decay Vocabulary: alpha particle, atomic number, beta particle, daughter product, gamma ray, isotope, mass number, nuclear decay, positron, radioactive, subatomic particle Prior Knowledge Questions (Do these BEFORE using the Gizmo .) The chart below gives the locations, …You can use the Half-life Gizmo to model the decay of Carbon-14, which has a half-life of approximately 6,000 years (actual value is 5,730 years). In the Gizmo, select User chooses half-life and Theoretical decay. Set the Half-life to 6 seconds (to represent 6,000 years) and the Number of atoms to 100.Jan 19, 2024 · Student Exploration: Nuclear Reactions [Note to teachers and students: This Gizmo was designed as a follow-up to the Nuclear Decay Gizmo. We recommend doing that activity before trying this one.] Allison Soult, Ph.D. (Department of Chemistry, University of Kentucky) 11.4: Nuclear Decay is shared under a CC BY-NC-SA 3.0 license and was authored, remixed, and/or curated by LibreTexts. Unstable nuclei spontaneously emit radiation in the form of particles and energy. This generally changes the number of protons and/or neutrons in the ...Find Your Solution. Start playing, exploring and learning today with a free account. Or contact us for a quote or demo. Explore nuclear decay with ExploreLearning Gizmos! Students observe the five main types of decay and learn to write nuclear equations. Lesson plans included!Sep 3, 2019 · Student Exploration- Nuclear Decay (ANSWER KEY) Prior Knowledge Questions (Do these BEFORE using the Gizmo.) particles. The approximate mass of each particle is given in universal mass units (u). 1. The mass number of an atom is equal to the sum of protons and neutrons in the nucleus. A helium atom has 2 protons and 2 neutrons. The decay of radioactive atoms generally results in the emission of particles and/or energy. Several types of nuclear decay can be explored with the Nuclear Decay ….