the atom will be converted into anion which has -3 charge on it.
Neutral atom carries atomic number 15 and atomic mass 31. This is phosphorous (P) atom with 15 electron. We know no. of proton are equal to no. of electron in neutral atom. After gain of 3 electrons, total number of electrons in P atom will change to 18. This results neutral atom onversion into a negative charge ion with a charge of 3-.
