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