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The effective nuclear charge, Zeff, for a valence electron can be approximated using the "core charge" of the atom, that is, the total charge of the nucleus and the inner (non-valence) electrons. Determine the core charge for an atom on Na.

Respuesta :

Answer:

1.

Explanation:

The atomic number of sodium is 11 and there are 10 inner electrons,

So the effective nuclear charge  required is 11 - 10 = 1.

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