Question

(v) Which of the following reason correctly justifies that "Fluorine (72pm) has
smaller atomic radius than Lithium (152pm)?

a) F and Li are in the same group. Atomic size increases down the group

b) F and Li are in the same period Atomic size increases across the period due to increase in number of shells

c) F and Li are in the same group. Atomic size decreases down the group

d) F and Li are in the same period and across the period atomic size/radius
decreases from left to right,​

Answer 1

Answer:

Opt d)

Explanation:

Since they both have 2 outermost shells,they are in the same period. So we know that atomic size decreases across the period. So option d is the right answer

Hope u understood

Answer 2

Answer:

c( F and Li are in the same group. Atomic size decreases down the group) is the correct option