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    Question

    Which of the following statement is/are true?

    >I. Atomic radius increases in moving from left to right along a period. II. Atomic size increases down the group.
    A Only II Correct Answer Incorrect Answer
    B Both I and II Correct Answer Incorrect Answer
    C Only I Correct Answer Incorrect Answer
    D Neither I nor II Correct Answer Incorrect Answer

    Solution

    On the periodic table, atomic radius generally decreases as you move from left to right across a period (due to increasing nuclear charge) and increases as you move down a group (due to the increasing number of electron shells). In a group, the size of an atom increases as one proceeds from top to bottom. This is due to the successive addition of shells as one move from one period to the next in a group.

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