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31-08-2016
Biology

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how is the mass number calculated for an element

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meerkat18 meerkat18

01-09-2016

The atomic number of a neutral atom is equal to the number of protons and the number of electrons of the atom. The atomic weight meanwhile is equal to the sum of the number of protons and number of neutrons. We add therefore the number of protons and number of neutrons

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