Write the reaction of the borohydride ion with water

B) Iron and Cobalt atoms don't attract since their protons and electrons are balanced, meaning both elements are neutral.

Explanation:

Electrons have a charge of -1 and protons have a charge of +1. If an atom has the same amount of electrons as protons, the overall charge of the atom is neutral (no charge)

Hint: Think of 27 and subtract 27 from that.

27 - 27 = 0