Across
- 4. positively charged unit
- 7. a substance with two or more elements
- 9. composed of protons and neutrons
- 12. negatively charged unit
- 14. the starting molecules of a chemical reaction
- 15. an atom the has an unequal number of protons and electrons
- 16. a chemical bond that forms between two molecules, one with a partially positive hydrogen and one with a partial negative atom
Down
- 1. smallest unit of matter
- 2. a chemical bond that results from the attraction between oppositely charged ions
- 3. a substance that cannot be broken down into other substances
- 4. the final molecules of a chemical reaction.
- 5. three words; a chemical bond that results from the transient local partial charges of two molecules
- 6. anything that takes up space and has mass
- 8. form of an element with the same number of protons but differing number of neutrons
- 10. a chemical bond that is formed due to the sharing of a pair of electrons
- 11. form of an element with an unstable nucleus
- 13. electrically neutral