Atom

3 Min
Created at 08 / 2014
8.9
8.7   Informative
9.0   Entertaining
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By Teacher's Pet
49 Videos
This channel is full of quick science videos made by a science teacher in California... Read More

What is an atom?

Atoms are the basic units of matter and the defining structure of elements. Atoms are made up of three particles: protons, neutrons and electrons. Protons and neutrons are heavier than electrons and reside in the center of the atom, which is called the nucleus. The number of neutrons defines the isotope of the element.


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