Lisa observes that in group 17, ions increase in radius from top to bottom. Which explanation best accounts for this observation? Group of answer choices

A)From top to bottom, added electrons occupy increasingly lower principle energy levels.

B)From top to bottom, added electrons occupy increasingly higher principal energy levels.

C)From top to bottom, added protons pull more strongly on electrons.

D)From top to bottom, the ions in this group have greater and greater negative charges.

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.