Write the electron configuration for the neutral atom or ion indicated in the sp

Question

Write the electron configuration for the neutral atom or ion indicated in the space provided. It is OK to use the condensed notation in which the noble-gas core is represented using the appropriate symbol in square brackets. For example, the electron configuration of Al is [Ne]3s23p1

(a) Write the electron configuration of Sn (Z = 50).

(b) Write the electron configuration of Ni2+ (Z = 28).

(c) Write the electron configuration of Te2– (Z = 52).

(d) Write the electron configuration of Os (Z = 76).

(e) Write the electron configuration of Pb4+ (Z = 82).

Explanation / Answer

a. Sn = 50      [Kr]4d105s25p2

b. Ni = 28     [Ar] 3d84s2

Ni --------> Ni+2

   28e- 26e-

Ni+2 =   [Ar] 3d8

C. Te = 52 =      [Kr]4d105s25p4       

Te +2e- ------> Te2-

52e-                54e-

Te2-   = [Kr]4d105s25p6

d. Os = 76 = [Xe]4f14 5d66s2

e. Pb =82= [Xe]4f145d106s26p2

    Pb -------> Pb+4 +4e-

   Pb+4     [Xe]4f145d10

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