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  • Created by: charlotte
  • Created on: 18-05-10 18:01

atoms and elements.

What is an atom?

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An atom is the simplest particle of matter that can take part in a chemical reaction.

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What is an element?

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Elements are made up of only one type of atom. They are pure substances.

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Molecules and compounds.

What are molecules?

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Atoms can join together in groups. These atoms are joined together by chemical bonds. These groups, wshich may be large or small, are called molecules.

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What are compounds?

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A compound is formed when atoms from different elements join together by chemical bonds.

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What is ethanol?

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ethanol is made up of three elements. Carbon, hydrogen and oxygen.Ethanol is made up of 9 atoms. ( 2 carbon, 6 hydrogen and 1 oxygen.) Ethanol is a module because it has more than one atom chemically joined. Ethanol is a compound because it is made up up of more than one type of atom.

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