Across
- 4. The smallest particle of a chemical element
- 7. A group of atoms that makes a element/compound
- 8. The branch of science which matter is composed
- 10. Positively charged particles of an atom
- 11. A substance made up of only one atom
- 14. The way the periodic table is arranged
Down
- 1. The number of protons minus electrons
- 2. The mass of an atom
- 3. A small region protons at the center of an atom
- 5. Neutrally charged particles of an atom
- 6. Negatively charged particles of an atom
- 9. Atoms which contain an overall charge
- 12. 2 or more substances that are mixed(not joined)
- 13. 2 or more different atoms chemically joined