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Test your knowledge of atomic structure with questions about protons, neutrons, electrons, and more. Challenge yourself with topics from 1st to 5th grade. Can you answer the million-dollar question?
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1,000,000 500,000 300,000 5th Grade Topic 1 5th Grade Topic 2 Are You Smarter Than a 5th Grader? 175,000 100,000 4th Grade Topic 3 4th Grade Topic 4 50,000 3rd Grade Topic 5 3rd Grade Topic 6 25,000 10,000 2nd Grade Topic 7 2nd Grade Topic 8 5,000 2,000 1st Grade Topic 9 1st Grade Topic 10 1,000
5th Grade Topic 1 Question Two different isotopes of the same atom have the same….
5th Grade Topic 1 Answer • protons
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5th Grade Topic 2 Question • What is the mass number of an isotope that has 7 protons, 8 neutrons, and 7 electrons?
5th Grade Topic 2 Answer • 15 amu
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4th Grade Topic 3 Question • The atomic mass unit (amu) of an atom of oxygen is 16 amu. If there are 8 neutrons, how many protons are there?
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4th Grade Topic 4 Question The ____ _____ of an element is the number of protons in an atom of that element.
4th Grade Topic 4 Answer • Atomic number
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3rd Grade Topic 5 Question • What are the positive charged particle of an atom?
3rd Grade Topic 5 Answer • protons
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3rd Grade Topic 6 Question • How many electrons does the element Californium have which has the atomic number of 98?
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2nd Grade Topic 7 Question • Who used a gold-foil experiment to show that atoms are mostly empty space with dense, positive nucleus?
2nd Grade Topic 7 Answer • Ernest Rutherford
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2nd Grade Topic 8 Question • Who discovered that there are small particles inside an atom that have negative charges: electrons?
2nd Grade Topic 8 Answer • J.J. Thomson
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1st Grade Topic 9 Question • What is the central part of an atom that is made up of protons and neutrons?
1st Grade Topic 9 Answer • The nucleus
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1st Grade Topic 10 Question What is smaller unit of an element that maintains the properties of that element?
1st Grade Topic 10 Answer • an atom
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1,000,000 Question • What are the maximum amount of electrons that can occupy the first 3 shells of each electron cloud?
1,000,000 Answer • 2, 8, 18