2.
pure substance made of one type of atom
3.
group of atoms bonded together
4.
substance formed by two or more elements
6.
substance that donates protons
7.
substance that accepts protons
8.
measure of acidity or basicity
9.
force holding atoms together
10.
amount of matter in an object
12.
substance that undergoes change in a reaction
13.
result of a chemical reaction
15.
negatively charged particle
