Chemical Reactions

2. Type of reaction that absorbs energy.
3. The sign used to show which direction(s) the reaction is going.
5. The number of atoms of that element in ONE compound.
9. Forming chemical bonds ____________ energy.
10. Type of chemical reaction that releases energy.
13. When three PAIRS of electrons are shared between two atoms.
16. A reaction where the products and reactants are forming at the same time.
17. The number that appears before a compound in a chemical reaction.
18. In a compound, chemical energy is contained in the ___________.

1. The new substances formed in a chemical reaction.
4. When two PAIRS of electrons are shared between two atoms.
6. The total mass of the reactants equals the total mass of the products, or the law of ____________ of mass.
7. Bonds of reactants are broken, and bonds of products are formed during a chemical _________.
8. When a PAIR of electrons are shared between two atoms.
11. A short simple way to describe a chemical reaction using symbols and formulas instead of words.
12. Identifies the element(s) that make up a compound.
14. Breaking chemical bonds _____________ energy.
15. The substances that undergo change in a chemical reaction.