| Representation of an Atom
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| It has to be remembered that atomic mass and atomic weights are not exactly the same. Atomic weight takes into account the actual weight of an atom, including the weight of the electrons, their binding energies, etc. |
| We have now seen that there are three numbers which describe an atom: Z, N and A. The number of electrons is same as the number of protons Z, hence no extra number to show the electrons is required while representing an atom. |
| An atom X is represented as AZXN , AZX or as ZXA . |
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