Question

group and period of Li , Cl , Ar

Answer 1

$\huge\mathsf{Lithium \ (Li)}$

$\mathsf\red{\boxed{Group \ = \ 1}}$

$\mathsf\blue{\boxed{Period \ = \ 2}}$




$\huge\mathsf{Chlorine \ (Cl)}$

$\mathsf\red{\boxed{Group \ = \ 17}}$

$\mathsf\blue{\boxed{Period \ = \ 3}}$




$\huge\mathsf{Argon \ (Ar)}$

$\mathsf\red{\boxed{Group \ = \ 18}}$

$\mathsf\blue{\boxed{Period \ = \ 3}}$

Answer 2

☆ Here is your answer ☆

☆ Lithium

☆ Group : 1

☆ Period: 2

☆The atomic number of lithium is 3 and it's valency is 1.

☆ Chlorine

☆ Group: 17

☆ Period : 3

☆ The atomic number of chlorine is 17 and it's valency is 1.

☆ Argon

☆ Group : 18

☆ Period : 3

☆ The atomic number of argon is 18 and it's valency is 0.

☆ Hope that this helps you ☆