Across
- 1. smallest unit that matter is made of
- 2. composed of atoms with the same number of protons
- 3. when an atom gains or loses an electron
- 4. positively charged subatomic particle
- 5. sunatomic particle with no charge
- 6. horizontal row on the Periodic Table
- 9. Group 17 elements
- 10. vertical column on the Periodic Table
- 11. negatively charged subatomic particle
Down
- 1. Mass = #protons + #neutrons
- 2. ability of an atom to attract an electron
- 7. reason the atomic mass on the periodic table is not a whole #
- 8. difference in electronegativity