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प्रश्न
Choose an element from period 3 of modern periodic table that matches the description given below in instance. Give a reason for your choice.
It has same valency as Lithium.
उत्तर
Sodium
Reason:
It has 1 valence electron like Lithium.
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संबंधित प्रश्न
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(i) A and D
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(iv) B and C
(v) A and C
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