Answers

2014-10-09T20:13:01+08:00
.An atom  is the basic unit of an element. An atom is a form of matter which may not be further broken down using any chemical means. A typical atom consists of protons, neutrons and electrons.   

molecules 
a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

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2014-10-09T20:17:39+08:00
Atom is an element And molecules is a compound
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