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Chất được chia làm bao nhiêu loại? Lấy ví dụ cho từng loại.
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Chất được chia làm bao nhiêu loại? Lấy ví dụ cho từng loại.

User Tmuguet
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Chất được chia làm hai loại là đơn chất và hợp chất.
Đơn chất: Cu, Cu2+,...
Hợp chất: CuO, CuCl2,...
User Wwilczyn
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