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Andrew Morris

on 22 August 2010

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Transcript of Atoms

The Atom! Atoms are small really small It's impossible to imagine just how small they are.
So don't even try. The only thing we can do is create models that represent what atoms are like in a way we can understand. As we learn more about atoms, our models have changed. Here is the model we accept today. Protons and neutrons are in the nucleus.
Electrons orbit the nucleus in "shells" Limitations of the Model Not to Scale, the nucleus is pictured to large for the size of the atom. An atom is mostly empty space.
Electrons don't orbit around like planets, they occupy areas around the nucleus called electron shells or clouds.

Protons: have a positive "charge"
have mass
located in the nucleus have no charge
have mass
located in the nucleus Neutrons: have a negative charge
have no mass*
located around the nucleus Electrons:
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