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प्रश्न
Which of the alkali metals given below has the smallest size?
पर्याय
Rubidium
Potassium
Sodium
Lithium
MCQ
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उत्तर
Lithium
Explanation:
All the given elements belong to Group 1 of the periodic table, collectively known as the alkali metals. As you move vertically down a group in the periodic table, the atomic size | increases because each successive element gains an additional electron shell. Since lithium (Li) sits at the very top of Group 1 with only two electron shells, it retains the smallest atomic size among the options.
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