Atomic radius is influenced by the number of electron shells and effective nuclear charge. Down a group, the number of shells increases, leading to larger size. Across a period, effective nuclear charge increases while the number of shells remains the same, pulling electrons closer to the nucleus and decreasing size.
In modern periodic table, which of the following statements about atomic radius are true ? (a) Increases from top to bottom (b) Decreases from top to bottom (c) Increases from left to right (d) Decreases from left to right
Asked in MPSC CS Prelims 2020 · Topic: Atomic Structure (Electronic Configurations of Multi-electron Atoms and Ions)
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