Question

Which of the following configuration corresponds to alkaline earth metals?
a) [Ne] 2s² 2p²
b) [Ar] 4s²
c) [Ar] 3d¹⁰ 4s¹
d) [Ar] 3d¹⁰ 4s²

Answer 1

b) option is correct I.e Ca (Ar) 4s2

Answer 2

Dear student,

◆ Answer -

(b) [Ar] 4s²

◆ Alkaline earth metals -

- Group 2 elements are mostly found in earth's crust & thus are called alkaline earth metals.

- For example, Be, Mg, Ca, Sr, Ba, Ra.

- Electronic configuration of alkaline earth metals is given by ns².

- They have 2 electrons in last s-orbit.

Thanks for asking. Hope this helped yoy.