Test Preparation on Chemical Bonding-I-Chemistry Test Series For NEET-2020

Ionic bonds are usually formed by combination of elements
with

Bond formed in crystal by anion and cation is

The species Ar, K⁺ and Ca²⁺ contain the same number of
electrons. In which order do their radii increase
(a) Ca²⁺ < Ar < K⁺     (b) Ca2+ < K⁺ < Ar
(c) K⁺ < Ar < Ca²⁺     (d) Ar < K⁺ < Ca²⁺

Magnesium reacts with an element (X ) to form an ionic
compound. If the ground state electronic configuration of (X )
is 1s ² 2s ² 2p³ , the simplest formula for this compound is

(a) Mg₂X₃     (b) MgX₂
(c) Mg₂X       (d) Mg₃X₂

Solid NaCl is a bad conductor of electricity since