Across
- 4. Anything that has mass and volume
- 6. A mixture where all substances look the same throughout
- 7. The amount of protons + neutrons
- 8. 2 or more atoms that are chemically combined
- 11. Electron located on the outer shell of an atom
- 13. The building block of all matter
- 15. Charge-less particle of an atom
Down
- 1. Number of protons in an atom
- 2. A mixture w/ visibly different substances throughout
- 3. 2 or more substances that are physically combined
- 5. A molecule that is made of 2 or more different types of atoms
- 9. A molecule that is made up of only 1 type of atom
- 10. Average mass of isotopes(types)of an atom
- 12. Negatively charged moving particle of an atom
- 14. Positively charged particle of an atom