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Q.

The number of electrons present in M-shell of an element with atomic number 24 is

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a

2

b

8

c

13

d

24

answer is B.

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Detailed Solution

Electronic configuration of Atomic number 24: 1s2 2s2 2p6 3s2 3p6 3d5 4s1
M-shell is third shell, i.e. n = 3
Number of electrons in third shell are 2+6+5 = 13

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