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    Rubentheran's Avatar
    Rubentheran Posts: 35, Reputation: 1
    Junior Member
     
    #1

    Jan 19, 2011, 11:25 AM
    Chemistry Help
    1.Write the Lewis dot symbols of the reactants and products in the following reactions

    Ca + H2 ----> CaH2

    2.For each of the following pairs of elements, state whether the binary compound they
    Form is likely to be ionic or covalent. Write the empirical formula and name of the
    Compound. (a) B and F (b) K and Br


    How am I supposed to do this?? Can someone help me? Thanks.I really cannot understand.So,someone please show me the workings/solutions step by step(at least).
    DrBob1's Avatar
    DrBob1 Posts: 425, Reputation: 86
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    #2

    Jan 19, 2011, 04:25 PM
    Can you show us what you have been able to do so far? Hints: (1) elements that are on the extremes (far left and far right) on the periodic table will form ionic bonds. Closer to each other, they tend to be covalent. (2) The first compound you show is named CALCIUM HYDRIDE. What does that tell you?
    Rubentheran's Avatar
    Rubentheran Posts: 35, Reputation: 1
    Junior Member
     
    #3

    Jan 19, 2011, 08:51 PM
    But I don't know how to draw the structure.Can you give a full solution of the drawing so that I will able to do the rest of the questions by using your solution as reference.thanks
    Rubentheran's Avatar
    Rubentheran Posts: 35, Reputation: 1
    Junior Member
     
    #4

    Jan 19, 2011, 08:52 PM
    Comment on DrBob1's post
    But I don't know how to draw the structure.Can you give a full solution of the drawing so that I will able to do the rest of the questions by using your solution as reference.thanks.Please sir
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #5

    Jan 19, 2011, 11:46 PM

    If you never studied how to do them... how did you get that question to do?

    If you still don't know, use Google to have a few examples about Lewis structures (I never studied Lewis structures, but Google provided a lot of useful examples).

    Then, you post what you think is the answer. We'll then tell you whether you did it correctly or not.

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