How many valence electrons are used to make sigma and pi bonds in the C_3H_6 molecule? How many valence electrons remain in nonbonding pairs in the molecule?

1 Answer
anor277
May 12, 2016

18 valence electrons are present; all of which are involved in bonding.

Explanation:

C, Z=6, and H, Z=1, have 4 and 1 valence electron(s) respectively. Thus there are 3xx4+6xx1=18" valence electrons" to distribute. For H_3C-(H)C=CH_2, there are 6xxC-H bonds, and 3xxC-C bonds = 9 bonds in total (one of these is a C=C bond). Thus all the valence electrons are involved in C-C or C-H bonds.

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