Bài 3: Cho biết trong cấu hình e nguyên tử của các nguyên tố X, Y, Z, T thì phân lớp có mức năng lượng cao nhất lần lượt là 3p1 ; 3d5 ; 4p3 ; 5s2 ; 4p6. a) Viết cấu hình e đầy đủ của mỗi nguyên tử. b) Cho biết mỗi nguyên tử có mấy lớp e, số e trên mỗi lớp là bao nhiêu? c) Nguyên tố nào là kim loại, phi kim, khí hiếm? Giải thích?

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