Across
- 2. a group of elements in the periodic table
- 4. a row of elements in the periodic table
- 6. number number of protons inside the nucleus
- 9. example: hydrogen
- 10. no charge
Down
- 1. structure of all matter
- 3. table holds all the elements
- 4. positive atom
- 5. negative atom
- 7. when there is a bound between atoms
- 8. made from 2+ atoms that are different elements