Question

The valency of the first group of element is-
১নং বর্গের মৌল সমূহের যাজ্যতা হল-
(a) 3 (b) 2 (c) 1 (d) 0.
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Answer 1

(c) 1

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Answer 2

Answer:

(c)१ valency of the every first group element is one