Question

Calculate effective nuclear charge for 4s electron of potassium

Answer 1

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Electronic configuration- (1s2) (2s2, 2p6)(3s2, 3p6)(3d10)(4s2).

For 4s electron,

σ = (0.35 × 1) + (0.85 × 18) + (1 × 10) = 25.65.

Z* = Z – σ = 30 – 25.65 = 4.35.

For 3d electron,

σ = (0.35 × 9) + (1 × 18) = 21.15.

Z* = Z – σ = 30 – 21.15 = 8.85.♥️