Question

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Answer 1

Answer:

1) 16th group is oxygen family, which is also called chalcogen. (a)

2) Moseley used X-rays decay. (a)

3) 16th group is oxygen family and its member include O, S, Se, Te and Po. (a)

4) P block elements have metals, nonmetals and metalloids. (b)

5) Inert gas belong to Group 18. (b)