1. It is the simplest type of matter.
2. It is made up of two or more elements.
3. It has a definite composition and unique set of properties.
4. It occupies space and has mass.
5. It is a compound made up of sodium and chlorine.
6. It is one of the components of water when broken down.
7. An example of element that is a metal.
8. Compounds can be classified as or base.
9. The smallest indivisible particle that makes up everything
10. A compound that is formed when iron reacts with oxygen
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The ancient Greeks believed atoms were the smallest bits of matter in the universe. Then scientists in the 20th century split the atom, yielding tinier ingredients: protons, neutrons and electrons
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