Across
- 3. elements by themselves
- 4. a group of atoms bonded together
- 7. subatomic particle with negative energy
- 9. table elements atoms sorted by atomic number
- 11. subatomic particle with electric charge
Down
- 1. is composed of two or more separate elements
- 2. a substance that cant be broken down
- 5. horizontal rows on a periodic table
- 6. number number of protons in an atom
- 8. subatomic particle without electric charge
- 10. vertical columns on a periodic table