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  • Show diagrammatically the electron distributions in a sodium atom and a sodium ion and also give their atomic number.

Show diagrammatically the electron distributions in a sodium atom and a sodium ion and also give their atomic number.

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Atomic number of sodium (Z) = 11
Mass number of sodium (A) = 23
∴ Number of protons in the nucleus = 11
Number of neutrons in the nucleus = 23 - 11 = 12 
Number of electrons = 11

_{11} Na - 2,8,1 (11 electrons)

Na-1e^{-}\rightarrow Na^{+} (10 electrons) Electronic configuration 2, 8.

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