Question : Which of the following statements is correct?
Option 1: Atomic radius increases across a period and decreases down a group in the periodic table.
Option 2: Atomic radius decreases across a period and increases down a group in the periodic table.
Option 3: Atomic radius decreases across a period and down a group in the periodic table.
Option 4: Atomic radius increases across a period and increases down a group in the periodic table.
Correct Answer: Atomic radius decreases across a period and increases down a group in the periodic table.
Solution : The correct option is Atomic radius decreases across a period and increases down a group in the periodic table.
This trend occurs because, across a period, increasing nuclear charge attracts electrons more strongly, leading to a decrease in atomic size. Down a group, atomic radius increases due to the addition of electron shells, leading to electrons being further from the nucleus, resulting in larger atomic size.
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