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6. Protons & electrons have electric charges that are...
- Equal, but opposite
- Equal, but same
- Unequal and opposite
- Unequal and same
7. What is the BEHAVIOUR of an atom fixed by?
- Nucleus
- Nuetrons
- Protons
- Atomic number
8. Atoms consist of...
- Protons, neutrons, electrons
- Neutrons, nucleons, electrons
- Protons, isotopes, electrons
- Protons, nucleons, electrons
9. What can stop an alpha particle? (penetration)
- 10-16 cm of air / 2 sheets of paper
- 4-10 cm of air / 4 sheets of paper
- 4-10 cm of air / 1 sheet of paper
- 10-16 cm of air / 1 sheet of paper