Question

predict the position of the elements in the periodic table satisfying the electronic configuration (n-1)d^1 ns^2 for n =4​

Answer 1

Here outermost electron enters into the 3d hence the element belongs to d- block, number of group for d- block element = no.of electrons in (n-1) orbital + no.of electrons in orbital = 2+1 =3. Hence, the element belongs to 3rd group. Here principal quantum number is equal to the peroid of the element. Hence, the element belongs to 4th period.

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