Anonymous
Anonymous asked in 科學及數學化學 · 1 decade ago

CHEM,,

元素X 原子序為12

元素Y 原子序為7

生成化化學式是什麼?

唔該解釋下,,一D都唔明

3 Answers

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  • 1 decade ago
    Favorite Answer

    元素X belongs to Group II (2, 8, 2) ,

    with +2 charge

    元素Y belongs to Group V (2, 5) ,

    (8 - 5) = 3 ,

    so with - 3 charge

    as a result ,

    the chemical formula is X3Y2 ((by 交叉相乘))

    Source(s): my chemistry knowledge
  • 1 decade ago

    元素X 原子序為12 : 2,8,2 --> X2+

    元素Y 原子序為7: 2,5 --> Y3-

    CROSS METHOD:

    X Y

    2 3 --> X3Y2

  • 1 decade ago

    參考週期表

    X 是鎂Mg,離子屬+2

    Y是氮(N),離子屬-1

    生成化化學式是MgN2

    Source(s): myself
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