Question

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

Answer 1

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
`"[Ar]3d"^1"4s"^2"`

Yttrium
`"[Kr]4d"^1"5s"^2"`

Lanthanum
`"[Xe]5d"^1"6s"^2"`

Actinium
`"[Rn]6d"^1"7s"^2"`