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Most covalent bonds involve the sharing of __________ electrons.
(i) three (ii) two
(iii) four (iv) six
A. (i), (ii), (iii), (iv)
B. (ii), (iii), (iv)
C. (i), (ii), (iii)
D. (ii), (iii)

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Correct Answer - B
Most covalent bonds involve the sharing of one, two, or three pairs of electrons. Two atoms form a single covalent bond when they share one pair of electrons, a double covalent bond when they share two electron pairs, and a triple covalent bond when they share three electron pairs. These are usually called simply single, double and triple bonds. Covalent bonds that involve sharing of one and three electrons are known, but are relatively rare.

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