Nguyên tố X có công thức oxit cao nhất là x2o trong bảng tuần hoàn X thuộc nhóm

  • Câu hỏi:

    Nguyên tố X thuộc nhóm B của bảng tuần hoàn. Oxit ứng với hóa trị cao nhất của X có công thức hóa học X2O5.. Biết rằng nguyên tử của nguyên tố X có 4 lớp electron. Cấu hình electron nguyên tử của X là

    Lời giải tham khảo:

    Đáp án đúng: A

    Đáp án: A

    X nằm ở nhóm VB của bảng tuần hoàn.

  • Nguyên tố X thuộc nhóm VIA, công thức oxit cao nhất của nguyên tố X là :

    A. XO.

    B. XO3.

    C. XO2.

    D. X2O.

    Đáp án và lời giải

    Đáp án:B

    Câu hỏi thuộc đề thi sau. Bạn có muốn thi thử?

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