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6. How big are atoms?
- Tiny
- Small
- Medium sized
- Massive
7. What does the nucleus contain?
- Electrons and neutrons
- Protons and neutrons
- Protons and electrons
- Electrons
8. Neutral atoms have...
- A negative charge
- A positive charge
- No charge
- A charge
9. Fill in the gaps...It's the number of - in an atom that determines what element it is.
- Shells
- Neutrons
- Protons
- Electrons
10. The nucleus has an overall...
- None of the options
- Positive charge
- Neutral charge
- Negative charge
11. In a neutral atom the number of protons always equals the number of...
- The electrons
- 26
- The neutrons
- 8
12. The majority of the mass of an atom is concentrated in the...
- Nucleus
- Electrons
- Protons
- Neutrons
13. Elements all have different properties from each other due to differences in their...
- Atomic structure
- Electron number
- Atomic mass
- Proton number
14. The number of neutrons isn't fixed but is usually the same as the number...
- 2
- Of protons
- of electrons
- 45