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Chemistry · Classification of Elements and Periodicity in Properties
हिन्दीGiven below are two statements: Statement I: The atomic radius generally decreases across a period from left to right due to an increase in effective nuclear charge. Statement II: The atomic radius increases down a group because the principal quantum number (\( n \)) increases and inner core electrons shield the valence electrons. In the light of the above statements, choose the most appropriate answer from the options given below:
Correct answer · Option 1
Both Statement I and Statement II are correct.
Explanation
Both periodic trends are correct: effective nuclear charge reduces size across a period, while increased principal shell increases size down a group.
