SATHEE: D-And F-Block Elements Ques 241

D-And F-Block Elements Ques 241

Question: General configuration of outermost and penultimate shell is $(n - 1), s^{2}, (n - 1) p^{6} (n - 1) d^{x} n s^{2} .$ If n = 4 and x = 5 then no. of proton in the nucleus will be

[MP PET 2003]

Options:

A) > 25

B) < 24

C) 25

D) 30

Show Answer

Answer:

Correct Answer: C

Solution:

Given n = 4 x = 5 So $\underset{3 s^{2}}{(4 - 1) s^{2}}, \underset{3 p^{6}}{(4 - 1) p^{6}}, \underset{3 d^{5}}{(4 - 1) d^{5}}, \underset{4 s^{2}}{4 s^{2}},$ Total electron = 2 + 6 + 5 + 2 = 15 Electron in 1 + 2 orbit = 2 + 8 = 10 Total electron = 10 + 15 = 25 No. of electron = No. of proton So total proton = 25

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D-And F-Block Elements Ques 241

Question: General configuration of outermost and penultimate shell is (n−1),s2,(n−1)p6(n−1)dxns2. If n = 4 and x = 5 then no. of proton in the nucleus will be

Options:

Answer:

Solution:

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Question: General configuration of outermost and penultimate shell is $(n - 1), s^{2}, (n - 1) p^{6} (n - 1) d^{x} n s^{2} .$ If n = 4 and x = 5 then no. of proton in the nucleus will be