Which would have the LEAST gravitational potential energy (GPE)? O A ball sitting on the ground

An airplane flying 30,000 feet above the ground

A rock sitting on top of Mt. Everest

the answer for sodium is 0.186

the answer for rubidium is 0.251

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.