Bài 17: Những lĩnh vực nào của con người cần thiết phải dùng bình đựng khí nén oxi để hô hấp? Bài 18: Viết các CTHH của các oxit tạo nên từ các nguyên tố sau và gọi tên a) Cu (I) và O (II); Cu (II) và O. b) Al và O; Zn và O; Mg và O; c) Fe (II) và O; Fe(III) và O d) N (I) và O; N (II) và O; N (III) và O; N (IV) và O; N (V) và O.

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