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Q.

The atomic number of element having pseudo inert gas configuration in it’s atomic state is

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a

47

b

48

c

46

d

45

answer is A.

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Detailed Solution

An element with pseudo noble gas configuration has 18 electrons in the outermost shell instead of 8.
Therefore, element having filled d orbital in ground state will have this pseudo inert gas configuration.
For element with atomic number 46, the configuration is [Kr]4d10, standing for a filled d orbital.
Hence, option (A) 46, is the correct answer.

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