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प्रश्न
Right or wrong sentence.
The size of an atom depends on the number of valence electrons.
विकल्प
Right
Wrong
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उत्तर
The given sentence is wrong.
Explanation:
Atomic size is determined mainly by the principal quantum number (which shell the valence electrons occupy) and by effective nuclear charge and shielding, not simply the count of valence electrons. Atoms down a group get a new shell, so size increases, while across a period, added electrons stay in the same shell, but higher nuclear charge pulls them closer, so size decreases.
संबंधित प्रश्न
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