Question

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:

The atomic size increases from top to bottom in a group as the atomic number increases. Since there are more filled energy levels so the valence electrons are found farther from the nucleus increasing the atomic size

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