When looking across the periodic table from left to right, which of these groups are the first to contain nonmetals? group 2

Question

When looking across the periodic table from left to right, which of these groups are the first to contain nonmetals?

group 2
group 7
group 14
group 18

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Hải Đăng 3 months 2021-08-17T02:08:11+00:00 1 Answers 30 views 0

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    2021-08-17T02:09:38+00:00

    Answer:

    The first group to contain a non-metal is Group 18.

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )