Across
- 3. shorthand way of representing an element
- 5. the average mass of the element
- 7. has a positive charge
- 8. has a negative charge
- 9. the tiny central core of an atom
Down
- 1. formed by 2 or more atoms bonded together
- 2. has a neutral charge
- 4. Anything that has mass a takes up space
- 5. the number of protons in it's nucleus
- 6. The smallest particle of an element