Across
- 9. the basic units of matter which consist of protons, neutrons, and electrons
- 10. mixtures that have a nonuniform appearance and consist of visibly different substances
- 11. a shortened version of the name of a chemical element
- 12. form when atoms share one or more electrons
- 14. small, negatively charged particles located in atomic orbits
- 15. the columns of a periodic table
- 17. occurs when electrons are transferred from one atom to another
- 18. substances in which two or more elements chemically combine
Down
- 1. pure substances consisting of one type of atom
- 2. the approximate mass of an element
- 3. the electrons located in the outermost occupied orbit in an atom and can participate in chemical bonding
- 4. the rows of a periodic table
- 5. involves changing shape, size or temperature and/or physical state
- 6. involves change in color, odor, or flavor or releases a gas
- 7. large particles with no charge
- 8. mixtures that have the same uniform appearance throughout
- 13. the number of protons in an atom
- 16. large, positively charged particles