Across
- 2. number of protons an element has
- 7. columns on the periodic table
- 9. a table with all the elements
- 10. the rows on the periodic table
- 11. a bunch of the same atoms together not bonded
Down
- 1. has more than one different element
- 3. has no charge
- 4. smallest unit of matter
- 5. has a positive charge
- 6. has a negative charge
- 8. a group of atoms bonded together