Across
- 4. Smallest part of an element
- 5. Substance made up of more than one kind of atom
- 6. Part of atom with no charge (neutral)
- 10. Negative part of an atom
- 11. Has mass and takes up space
- 13. Atom of an element with a different number of neutrons
- 14. Pure substances made of only one kind of atom
Down
- 1. Contains protons and neutrons
- 2. Total number of protons and neutrons in an atom
- 3. Number of protons in an atom
- 7. Where electron are found in an atom
- 8. Positive part of atom
- 9. Solid liquid and gas
- 12. Smallest part of a compound