Question

According to modern periodic
table
while moving down the
group the atomic size
of elements ---




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Answer 1

Explanation:

as we move down the periodic table the size of elements increases

Answer 2

Answer :-

❉ According to modern periodic table while moving down the group atomic size of the elements increases .

Reason :

On moving down a group , the number of shells increases .

So , the distance from nucleus also increases and also the screening effect increases .

The nuclear charge also increases .

The effect of increase in the number of shells is more pronounced than the effect of increase in the nuclear charge .

Consequently , the distance between the nucleus and the outermost electron increases.

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Atomic size is also influenced by many factors like :

• Nuclear charge
• principal quantum number
• bond character
• multiplicity of bond
• oxidation state of atom
• co-ordination number of atom

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❈ Atomic size is least for hydrogen among all elements and is highest for caesium among the available elements .

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~ hope it helps !!