Question

Arrange the following as per the instruction in-the brackets – 

(1) He, Ar, Ne [Increasing order of the number of electron shells]. 

(2) Na, Li, K [Increasing ionisation energy]. 

(3) F, Cl, Br [Increasing electronegativity]. 

(4) Na, K, Li [Increasing atomic size].

Answer 1

1. He, ne, Ar (increasing number of electron shells) 

2. K, Na, Li (increasing ionisation energy) 

3. Br, Cl, F (increasing electronegativity) 

4. Li, Na, K (increasing atomic size)