Across
- 5. A description of a reaction using element symbols and chemical formulas.
- 6. Bond between a metal and a nonmetal, the attraction between positively and negatively charged ions in an ionic bond.
- 9. A substance that slows a chemical reaction.
- 11. Bond between metals.
- 13. A chemical reaction that absorbs thermal energy.
- 14. A substance created by a chemical reaction.
- 16. The minimum amount of energy needed to start (activate) a chemical reaction.
Down
- 1. The outermost electron of an atom that participates in chemical bonding.
- 2. Speeds up a reaction.
- 3. A number placed in front of an element symbol or chemical formula in an equation.
- 4. A chemical bond between metal/nonmetal formed when two atoms share one or more pairs of valence electrons.
- 7. A chemical reaction that releases thermal energy.
- 8. two or more atoms that are held together by covalent bonds and act as a unit.
- 10. An atom that is no longer neutral because it has lost or gained a valence electron.
- 12. A process in which atoms of one or more substances rearrange to form one or more new substances.
- 15. A starting substance in a chemical reaction.