Question

effective nuclear charge of potassium in 4s electron​

Answer 1

Answer:

it is not possible for nuclear charge of potassium

the odder of 1s, 2s, 2p3s, 3p, 4s

the atomic number of potassium is 19.

it is fill up to 4s1.

one eletron will left

so the effective neculear charge of potassium is not possible

Answer 2

Effective Nuclear Charge of K = 2.20

Explanation:

Electronic Configuration of K, Potassium = $1s^2, 2s^22s^22p^6, 3s^23p^6, 4s^1$

and its atom has 4 shells in it.

Hence, $(Z_{eff})_{4s} = Z - \sigma$

$\sigma = (0.85 \times number\ of\ electrons\ in$$(n - 1)th\ shell + 1.00 \times total\ number\ of\ electrons\ in\ the\ inner\ shell)$

= $0.85 \times 8 + 1.00 \times 10$

= 16.80

Hence, $Z_{eff} = Z - \sigma$

= 19 - 16.80

= 2.20