Question

If the valence electron configuration of this element is $x{s}^{2}6f^y$ and $7d^z$, then find out the value of $x,y$ and $z$ :

• A. $x=8,y=14,z=10$
• B. $x=7,y=12,z=10$
• C. $x=9,y=10,z=10$
• D. None of the above

Answer 1

The correct option is A $x=8,y=14,z=10$

The element belongs to eight period so, $n=8$ i.e. $x=8$
Since both y and z corresponds to d and f orbital which can accommodate a maximum of 10 and 14 electrons, then y and z are 10 and 14 respectively.