Question

Give reason as to why the atomic radii of elements increase in a group while moving from top to bottom ?

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Answer 1

Answer:

This is caused by the increase in the number of protons and electrons across a period. One proton has a greater effect than one electron; thus, electrons are pulled towards the nucleus, resulting in a smaller radius. Atomic radius increases from top to bottom within a group. This is caused by electron shielding.

Explanation:

Answer 2

Answer:

The atomic radii of elements increase in a group which moving from tap to bottom because a new shell is being added when we go down a group. This increases the distance between the outer most electrons and the atomic size and n spite of increase in nuclear charge

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