(c) Copyright 1999. All rights reserved.
We need these additional facts before looking at helum some more.
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1. The mass of an electron is very small compared to a proton.
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2. The nucleus of an atom may also contain one or more neutrons.
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3. The mass of a neutron is about the same as the mass of a proton.
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4. A neutron has no charge. |
(c) Copyright 1999. All rights reserved.