Vocabulary #3 Chemical Changes

1-compound: a chemical combination or two or more elements.

2-chemical bond: a link that atoms or electrically charged particles can form with each other.

3-chemical formula: a way of using letters and numbers to show how much of each element.

4-ion: an electrically charged particle with unequal numbers of protons and electrons.

5-molecule: a group of bonded atoms that acts like a single particle.

6-chemical property: a way of describing how a substance changes chemically with other substances.

7-exothermic: a reaction that gives off heat.

8-endothermic: a reaction that absorbs heat.