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Friday, July 23, 2021

What is the shielding constant (S) experienced by a 3d electron in the bromine atom?

Step (1): Write the electronic configuration of Bromine in the appropriate form.

Br: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5

Br: (1s2)(2s2,2p6)(3s2,3p6)(3d10)(4s2,4p5)

Step (2): Use the Slater Rule to calculate the shielding constant for the electron. And ignore the group of electron to the right of the 3d electrons, these electrons do not contribute to the shielding constant.

(S)3d = (d electrons-1)x 0.35+ (remaining electrons)x1.00= 21.15

(S)3d = (10-1)x 0.35+ (18)x1.00= 21.15

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