Across
- 4. The basic unit of matter
- 5. When an electron is gained or lost
- 6. negative charge
- 7. Have a different amount of neutrons in the nucleus
- 10. make up half the nucleus
- 12. When two elements share an electron unequally
- 14. when two elements share an atom equally
Down
- 1. When two atoms share an electron
- 2. made up of two elements
- 3. When two of the same element sticks to eachother
- 8. Pure substance
- 9. Has a positive charge
- 11. when atoms lose or gain an atom a(n) ___ is formed
- 12. When two elements are shared between
- 13. When two different elements stick to each other