An anion of 2- indicates that an element has
A) lost two electrons.
B) lost two protons.
C) lost two neutrons.
D) gained two electrons.
E) gained two protons.
An anion of 2- indicates that element has that it has lost two protons and it has more electrons than proton that's why they have a negative charge on the atom of molecule .For example if you see an element represented by the "-' charge represent that it has one less proton than the total number of electrons.
so by the above conclusion we can conclude that it has -
B) It has lost two protons.