INSTANT BRAINLIEST PLEASE HELP. HURRYY. The electron configuration of an element is 1s22s22p6. Describe what most likely
happens when an atom of this element comes near an atom having seven valence
electrons.

So, when an atom of element having electronic configuration 1s22s22p6 1 s 2 2 s 2 2 p 6 comes closer to an atom having seven valence electrons is capable of forming covalent bond

the atom with the 7 Valence electrons will get the one from another atom that has the above electronic configuration (which was mentioned by u)..then those 2 atom combines and form a molecule

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.