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- 1. Fill in the Blank
Which sub-atomic particle has a relative charge of -1?
- 2. Multiple Choice
Which sub-atomic particles have a relative mass of 1?
proton
electron
neutron
- 3. Fill in the Blank
What is the relative charge of a neutron?
- 4. Fill in the Blank
The overall charge of any atom is zero because all atoms have an equal number of positive protons and negative _________.
- 5. Fill in the Blank
All atoms of the same element have the same number of _______ in the nucleus.
- 6. Multiple Choice
What is the approximate radius of an atom?
1x10-5 m
1x10-10 m
1x10-15 m
1x10-20 m
- 7. Multiple Choice
What is the approximate radius of a nucleus?
1x10-11 m
1x10-12 m
1x10-13 m
1x10-14 m
- 8. Multiple Choice
The mass number gives the number of __________ in the atom.
protons and neutrons
protons and electrons
electrons and neutrons
neutrons
- 9. Fill in the Blank
What is the mass number of sodium?
- 10. Fill in the Blank
What is the atomic number of helium?
- 11. Multiple Choice
How many protons are there in an atom of helium?
2
4
6
8
- 12. Multiple Choice
How many neutrons are there in an atom of helium?
2
4
6
8
- 13. Fill in the Blank
How many protons are there in an atom of sodium?
- 14. Fill in the Blank
How many electrons are there in an atom of sodium?
- 15. Fill in the Blank
How many neutrons are there in an atom of sodium?
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