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Yennhitran26012000
2 năm trước
Bài tập 12: Dùng bảng tuần hoàn các nguyên tố hoá học hãy : a, Viết công thức oxit cao nhất và hợp chất với hidro của các nguyên tố trong chu kì 3 b, Nguyên tố nào trong chu kì 3 có tính kim loại mạnh nhất ? Tính phi kim mạnh nhất ?.
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