Across
- 3. surrounds the nucleus and contains the nucleus
- 5. protons plus neutrons (2 words)
- 7. one of the basic unit of a chemical element
- 8. positive subatomic particle in an atom
- 10. no electrical charge
Down
- 1. element with H as its symbol
- 2. table this table shows all the different atoms there are on earth
- 4. has an equal amount of protons and electrons
- 6. number of protons ( 2 words)
- 9. center of an atom