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In the periodic table of elements, on moving from left to right across a period, the atomic radius
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- decreases
- increases
- remains unchanged
- does not follow a definite pattern
- decreases
Correct Option: A
The atomic radius is the distance from the atomic nucleus to the outermost stable electron orbital in an atom that is at equilibrium. It tends to decrease across a period from left to right. It usually increases while going down a group due to the addition of a new energy level (shell).
