Aneutral atom possesses an atomic number of 15 and an atomic mass of 31. three electrons are gained. what is the result of this conversion? a. a positively charged ion b. a new isomer of the element c. a new isotope of the element d. a negatively charged ion

D. a negatively charged ion

Explanation:

In the neutral state of any element the number of electrons and number of protons are equal in the number. Here in this case since number of electrons are 15 ( equal to atomic number) therefore number of protons are also 15. When 3 electrons are gained by the element this results in a  a negatively charged ion. The ion will have -3 charge over it. It either means excess of three electrons or deficiency of three protons.

answer; protein;

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements