b.__________________ Properties of elements repeat in a regular way as the atomic numbers increase.

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b.__________________ Properties of elements repeat in a regular way as the atomic numbers increase.

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Nick 4 months 2021-07-14T03:16:55+00:00 1 Answers 5 views 0

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    2021-07-14T03:18:28+00:00

    Periodic properties

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