Across
- 1. Found in the shells
- 6. When two atoms bond together
- 7. Different types of elements
- 9. List of the elements
- 12. columns of periodic table
- 13. When atoms gain electrons
- 14. Outer most electrons
Down
- 2. When two different atoms bond together
- 3. Atoms with different numbers of neutrons
- 4. Area of space where electrons reside
- 5. Neutral subatomic particle
- 8. rows of periodic table
- 9. Positive subatomic particle
- 10. When atoms lose electrons
- 11. Building blocks of matter