Aneutral atom possesses an atomic number of 15 and an atomic mass of 31. three electrons are gained. what is the result of this conservation? 15 points for who ever answers this pls a) a positively charged ion. b) a negatively charged ion. c) a new isotope of the element. d) a new isomer of the element .

There is one piece of relevant information in this question:  The atom is in a neutral state.  Because electrons have a -1 negative charge we see that the atom will go from being neutral to having a charge of -3.  It will become a negatively charged ion.  It cannot be an isomer because only molecules can have isomers; it isn't an isotope because an isotope merely has a different number of neutrons.

Idk the answer sorry