Across
- 2. Smallest unit of matter.
- 5. SI unit for counting in chemistry.
- 6. Negatively charged ion.
- 7. Mass of a molecule.
- 8. Positively charged ion.
Down
- 1. Combination of atoms.
- 2. Mass of an atom.
- 3. Mass of a mole.
- 4. Number of atoms in a molecule.
- 9. Charged atoms.