Glossary acid 1. Two or more compounds can be packed in a definite ratio into a crystal. A dot is used to separate the compounds in the formula.
Hydrates are a common type of addition compound.
A chemical bond is a strong attraction between two or more atoms. There are many types of chemical bonds, but all involve electrons which are either shared or transferred between the bonded atoms. A compound that contains two different elements. A covalent bond is a very strong attraction between two or more atoms that are sharing their electrons. The atoms in the compound are bound together by shared electrons.