Question

why atomic size of a zero group elements are more than atomic size of group 7 a elements
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Answer 1

answer :

group 18 is inert gas

Answer 2

Explanation:

• Group 7A elements are halogens like Fluorine, Chlorine, Bromine, Iodine.
• Group Zero elements are noble or inert gases like Helium, Neon, Argon, etc
• Atomic size is the distance between the nucleus of an atom to its outermost shell.
• Atomic size increases as we move from left to right that is across a period in the periodic table.

Since noble gases are placed right after the Halogens, atomic size of Zero group elements is more than that of group 7A elements.

KNOW MORE:

• Atomic size increases as we go down a period.
• Modern periodic table consists of 18 groups and 7 periods.