The term (k-n)/k a. increases in value as n approaches k. b. is greatest when k is very large. c. is the carrying capacity for a population. d. is zero when population size equals carrying capacity

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass

Ithink its c hope it : )