What is the Lewis dot structure of #BH_3#? How many lone pair electrons are in this molecule? How many bonding pairs of electrons are in this molecule? How many lone pair electrons are at the central atom?
Well, there are 6 electrons to distribute in
Boron has 3 valence electrons, and hydrogen has the 1; thus there are 4 valence electrons. The actual structure of borane is as diborane
By contrast, in ethane,