Which of the following bonds would be the most polar wihtout being considered ionic?

NetherCraft 0

[A] Mg-O

[B] C-O

[C] O-O

[D] Si-O

[E] N-O

2 Answers

  • The way to figure this out is first to know what ionic means: metal + non-metal. This eliminates A, since metals are columns 1-2A and the transition metals.

    Now you need to see how far apart each of the other atoms are from each other on the periodic table.

    O-O is neutral since each O has same electronegativity value.

    N-O is right next to each other and on same row (period) while C-O are two spaces away from each other (more polar).

    Si-O is also ƒᴀʀтher away, but since Si is in the next period, its electronegativity is much lower (valence electrons are further away from nucleus).

    So C-O is your answer, and it is based on the idea that electronegativity inceases as one moves up and to the right on the periodic table (with F the most electronegative).

    Hope this helps for you to apply on an exam!

  • [B] C-O is the answer

    A is ionic. C is non polar. D is weak polar and E is not as polar as B.

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