Match the following vocabulary

1. An atom that has gained or lost one or more electrons
ion
2. An atom that has lost electrons – usually metals
acid
3. An atom that has gained electrons – usually non-metals
covalent compound
4. A compound made out of all non-metal elements
ionic compound
5. Either the cation or the anion in the compound are made from a group of elements
cation
6. A compound that can donate a proton
anion
7. A compound made out of a cation and an anion
polyatomic ionic compound