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Atoms are the smallest part of an element. They are made from three different parts: protons , neutrons and electrons
Molecules consist of two or more atoms joined together mainly by covalent bonds.
Elements are substance that are made up from only one type of atom.
Compounds is combination of two or more elements chemically joined together by ionic bonds.
Organic compounds are compounds that are
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- Biology Note on Untitled, created by nabil2013 on 07/04/2014.
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