Across
- 2. an atom with a positive or negative charge
- 4. horizontal rows of the periodic table
- 7. ability of atoms to attract electrons
- 8. a negatively charged ion
Down
- 1. chemical ____, force that holds two atoms together
- 3. vertical columns of the periodic table
- 5. _____ rule, states that atoms tend to gain, lose, or share electrons in order to reach eight valence electrons
- 6. a positively charged ion