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  4. What is the position of the element in the periodic table satisfying the electronic configuration (n-1) d1 n s2 for n=4

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Q. What is the position of the element in the periodic table satisfying the electronic configuration $(n-1) d^{1}\, n s^{2}$ for $n=4$

Classification of Elements and Periodicity in Properties

Solution:

When $n=4$, the configuration will be $[Ar] ^{18} 3 d^{1}\, 4 s^{2}$ and thus period is fourth and group no. is third.