1. Tardigrade
  2. Question
  3. Chemistry
  4. An element has [ Ar ] 3 d1 configuration in its +2 oxidation state. Its position in the periodic table is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. An element has $[ Ar ] 3 d^{1}$ configuration in its $+2$ oxidation state. Its position in the periodic table is

AP EAMCETAP EAMCET 2016

Solution:

Electronic configuration of the element in $+2$ oxidation state is [Ar] $3 d^{1}$.

This electronic configuration is obtained after losing 2 electrons.

$\therefore $ Atomic number of the element

$=$ Atomic number of $Ar +1+2$

$=18+1+2$

$=21$

Thus, element is scandium. It is a d-block element.

The electronic configuration of

$ Sc =[ Ar ] 3 d^{1} 4 s ^{2}$

Here, $n=4$ therefore, it belongs to the $4 \text{th}$ period.

Group $=$ Total number of valence shell electrons $=3$

So, the element belongs to period-$4$, group-$3$.