Across
- 5. Ions with a positive charge
- 6. Chemical elements in order of atomic number
- 8. An atom with a net electric charge due to loss or gain of electrons
- 9. Made up entirely of one type of atom
- 10. A branch of physical science
- 13. No electric charge
Down
- 1. Ions with a negative charge
- 2. Emission of ionising radiation or particles
- 3. Made from different elements
- 4. Has a charge of negative electricity
- 5. When reactants contact each other
- 6. Has a charge of positive electricity
- 7. Made up of two or more substances
- 11. Surronds the nucleus of an atom
- 12. Made up of protons, neutrons, electrons