5. On the periodic table, which families are in the first period? a

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5. On the periodic table, which families are in the first period?
a

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Thu Hương 4 years 2021-08-30T07:23:52+00:00 1 Answers 5 views 0

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  1. King
    0
    2021-08-30T07:25:40+00:00
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    Alkali metals

    Alkali metals

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