The quiz is not timed but I need to bring my grade up in chemistry, I am pretty sure it is D but I am not 100% sure. In order for hydrogen bonding to occur in a molecule there needs to be a hydrogen bonded to a small, highly electronegative like:

A. nitrogen

B. oxygen

C. fluorine

D. All of the above

elements make up everything, and they combine to make compounds.

the answer is c

it takes on an electronical energy

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.