Elements & Compounds
- Elements are substances made from one kind of atom
- Compounds are made from two or more elements chemically combined
- Elements take part in chemical reactions in which new substances are made in processes that most often involve an energy change
- In these reactions, atoms combine together in fixed ratios that will give them full outer shells of electrons, producing compounds
- The properties of compounds can be quite different from the elements that form them
The properties of sodium chloride are quite different from sodium and chlorine