Question

calculate the effective nuclear charge on 4s in potassium (atomic number k =19​

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sinhaaaryan27

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Effective nuclear charge is given by Z - S ; Z = At No. = 19

S= No. of core e- = 18

Hence,

19 - 18 = 1+

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Alleei

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The effective nuclear charge of 4s electron in potassium is, 2.20

Explanation :

As we are given that, the element is potassium that has atomic number 19.

The electronic Configuration of (K), Potassium is,

Formula used to calculate the effective nuclear charge is:

and,

= 0.85 × (number of electrons in (n - 1)th shell) + 1.00 × (total number of electrons in the inner shell)

=

=

So,

Thus, the effective nuclear charge of 4s electron in potassium is, 2.20

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