The electron affinity of an atom typically depends on the
a. mass of the atom's nucleus.
b. number of electrons already present in the atom.
c. number of neutrons in the nucleus of the atom.
d. availability of an unfilled orbital in the atom.

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

its first and third is your answer i did the qustion the fourth isnt right