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Question

The atomic radii in periodic table among elements from right to left:

A
decreases
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B
increases
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C
remain constant
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D
first decreases and then increases
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Solution

The correct option is B increases
Atomic radius decreases from left to right within a period. 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.
The atomic radii in periodic table among elements from right to left increases.

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