In drawing Lewis structures, there are general guidelines to be followed:
1. The number of valence electrons equals group number.
The total number of valence electrons is:
2. Least electronegative element goes in the center.
The least electronegative atom is H. However, hydrogen can only form 1 bond and cannot act as the central atom. Hence, the central atom would be carbon.
Sketch the following molecule: CH3NH2 (whose skeletal structure is H3CNH2).
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