Across
- 1. the outer most electrons
- 5. center of an atom that contains protons and neutrons
- 7. number of protons plus neutrons in an element
- 8. Positive part of the nucleus
- 9. the basic building block of all matter
Down
- 2. A negative charge atom that is located in the electron cloud
- 3. The part of the nucleus that has no charge
- 4. small abbreviations of an element
- 6. the area around the nucleus that contains electrons
- 7. number of protons and electrons in an element