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Atoms and Atomic Structure

How can you tell how many electrons an atom of an element has?

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November 26, 2008 4:05AM

Atoms are neutral, meaning they have the same number of protons as electrons. The number of protons is called the atomic number (it is the little number on top of an element's symbol on the periodic table). So the atomic number tells us not only the number of protons, but also the number of electrons too (since they are the same amount).