F3 chem.!(Not homework)

How to draw the ionic bond formed by Calcium(2,8,8,2) and Chlorine(2,8,7)?

What is the chemical formula?

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How to draw the ionic bond formed by Lithium (2,1)and sulphur(2,8,5)?

What is the chemical formula?

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更新:

You can also teach me how to draw instead of uploading photos.

4 個解答

評分
  • 10 年前

    In Ca, there is 2 outmost-shell electrons

    In Cl, there is 1 outmost-shell electron

    Ca loses 2 electrons and 2 Cl receive 2 electrons from Ca.

    So chemical formula: CaCl2

    2011-02-19 17:49:19 補充:

    why form 3 have to be taught ionic bonding...

    it is supposed to learn in form 4 chem...

  • How to find the chemical formula?

    2011-02-19 19:37:46 補充:

    Thank you for 知識就是力量!

    Just like Biology,almost school is taught Digestion in Form4,but I learnt it this year.Maybe my school is strange!

  • 10 年前

    It is lithium sulphide, not 'lithium sulphur'

    2011-02-19 14:00:22 補充:

    001 is wrong. Sulphur only requirs two electrons for attending the octet structure. It should carry a 2- charge.

  • 10 年前

    ionic bond:[Ca]2+ 2[Cl]- 電荷寫上面

    chemical formula:CaCl2

    ionic bond:3[Li]+ [S]3-

    chemical formula:Li3S

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