Question

Alkaline earth metals _______ 

A) have the smallest atomic radius in a given period 

B) form monoanions 

C) form basic oxides 

D) exist as triatomic molecules 

E) form halides with the formula MX

Answer 1

Answer - (c) form basic oxides

Explanation: -

Radius of alkaline earth metal is more than d - block & P- block elements but less than alkali metals in a period.

- alkaline earth metals have very very less Electron affinity so don't form anion.

- form basic oxides because these are form basic hydroxide during hydrolysis .

CaO + H_{​​​​​​2} O ----> Ca(OH)₂ ​​​​​​

Calcium hydroxide is strong base

Exist in monoatomic form

Valency of alkaline earth metal is two so halide formula is MX_{​​​​​2.}