Question

Incorrect electronic configuration is represented by
(At. No.: Gd: 64, W: 74, Pd: 46,- Mo: 42)
(a) Gd = [Xe] 4f75d*6s2
(b) W = [Xe] 4f14, 50, 6s2
(c) Pd = [Kr] 48, 5s1
(d) Mo = [Kr] 40, 5s1
(1) (a) only
(2) (b) and (c) only
(3) (c) only
(4) (a) & (d) only

Answer 1

Answer:

Pd = [Kr] 48, 5s1

Explanation:

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Answer 2

Answer:

Incorrect electronic configuration is represented by  (b) and (c) only i.e.option(2).

Explanation:

Let us compare the electronic configuration of elements given in question with the configuration present in the periodic table.

(a)Gadolinium-The atomic number of gadolinium is 64. Its electronic setup is listed as follows:

                           Gd=[Xe] 4f⁷ 5d¹ 6s²

(b)Tungsten-The atomic number of Tungsten is 74. Its electronic setup is listed as follows:

                           W=[Xe] 6s²4f¹⁴5d⁴

(c)Palladium-The atomic number of Palladium is 46. Its electronic setup is listed as follows:

                           Pd=[Kr] 4d¹⁰

(d)Molybdenum-The atomic number of Molybdenum is 42. Its electronic setup is listed as follows:

                         Mo=[Kr] 4d⁵5s¹

So, by comparing the electronic configuration with the configuration given in question the correct answer among the given option is (2) i.e. (b) and (c) only.

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