NEET Chemistry Periodic Trends MCQ Question
Which of the following combinations about periodic trends is correct?
Atomic radius increases down a group and decreases across a period.
Electronegativity increases down a group and decreases across a period.
Ionization enthalpy decreases down a group and increases across a period.
Cation size is larger than its parent atom and anion size is smaller than its parent atom.
Correct Answer
Detailed Explanation
Statement A is correct as atomic radius indeed increases down a group due to additional electron shells and decreases across a period due to increasing nuclear charge. Statement B is incorrect; electronegativity decreases down a group and increases across a period. Statement C is accurate; however, it's not the correct choice here since only one option can be right. Statement D is false because cations are smaller and anions are larger than their parent atoms.
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