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- 1. Multiple Choice
What is the correct # of protons, electrons, and neutrons for Cobalt - 59?
27 protons, 59 electrons, & 27 neutrons
59 protons, 59 electrons, & 86 neutrons
27 protons, 27 electrons, & 32 neutrons
27 protons, 32 electrons, & 27 neutrons
- 2. Multiple Choice
Which subatomic particle(s) determine the mass of the atom?
protons & neutrons
protons only
protons & electrons
neutrons & electrons
- 3. Multiple Choice
What is the name of this isotope?
Germanium-32
Germanium-72
Germanium-72.64
Hafnium-72
- 4. Multiple Choice
What is an isotope?
Atoms of the same element with different masses.
Atoms of the same element with different # of protons.
Atoms of the same element with different atomic numbers.
Atoms of the same element with the different # of electrons.
- 5. Multiple Choice
What type of radioactive decay is pictured here?
Alpha decay
Beta decay
Gamma decay
Positron decay
- 6. Multiple ChoiceBalance the following equation:
146C --> 0-1e + ________145B146C147N42He - 7. Multiple Choice
In the symbol 167N what does the 7 stand for?
Mass number
Atomic number
Atomic mass
Number of neutrons
- 8. Multiple Choice
If an atom of Americium-231 (Am) goes through alpha decay, what would you have at the end?
Neptunium-227
Neptunium-234
Plutonium-231
Curium-247
- 9. Multiple Choice
After 22,800 years, approximately what percentage of the original carbon-14 remains?
15%
12.5%
6.25%
3.125%
- 10. Multiple ChoiceIn the symbol 20682Pb what does 206 stand for?Mass numberAtomic numberAtomic massNumber of protons
- 11. Multiple Choice
If an atom of potassium-40 (K) only goes through gamma decay, what would you have at the end?
Potassium-40
Calcium-40
Argon-35
Potassium-39
- 12. Multiple ChoiceRadioactive materials have unstable...electronsprotonsnucleineutrons
- Answer choicesTagsAnswer choicesTags