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6. Why are most atoms neutral?
- Because they have an equal number of protons and electrons
- Because they have more neutrons than anything else
7. What is the radius of an atom?
8. What is the radius of a nucleus?
9. What are ions?
- Neutral particles
- Charged particles that form when atoms lose or gain electrons
- A group of electrons
10. What is the mass number?
- Number of electrons plus the protons
- Number of protons and neutrons
- Number of electrons minus the neutrons
- Number of neutrons and electrons
11. What is an isotope?
- A variant of an element with a different number of protons but the same number of neutrons
- A variant of an element with the same amount of electrons, protons and neutrons
- A variant of an element with the same number of protons but a different number of neutrons
- A variant of an element with a different number of electrons