Question

20. Elements with atomic number 18 belongs to A) 2nd period, 8th group B) 3rd period, gth group C) 2nd period, 18th group D) 3rd period, 18th group
which period does it belongs to
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Answer 1

Answer:

Both of these elements are noble gases or inert gases and belong to the eighteenth group. Thus, the elements with atomic number 10 (Ne), 18 (Ar) belong to the same group which is group 18. So, the correct option is (b).

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Answer 2

Answer:

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