# Group lllB transition metals has how many electrons in d subshell?

Jul 26, 2018

They have one electron in their outermost d sublevel (subshell).

#### Explanation:

Group IIIB or group 3 contains the first elements that have an electron in their outermost d sublevel (subshell). The atoms of each element contain 1 electron in their outermost d sublevel.

Electron configurations of Group IIIB/3 Elements

Scandium
$\text{[Ar]3d"^1"4s"^2}$

Yttrium
$\text{[Kr]4d"^1"5s"^2}$

Lanthanum
$\text{[Xe]5d"^1"6s"^2}$

Actinium
$\text{[Rn]6d"^1"7s"^2}$