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Chemistry, 09.11.2021 01:00 cailynrachael

nguyên tử M và N đều có lớp electron ngoài cùng là lớp M và có tổng số electron Hóa trị là 9 biết m là nguyên tố s, n là phi kim. cho biết M, N thuộc nhóm nào trong bảng tuần hoàn

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nguyên tử M và N đều có lớp electron ngoài cùng là lớp M và có tổng số electron Hóa trị là 9 biết m...

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