Ill brainlist u. I really can't be bothered searching up rn lol btw this for my bro so he can get good grades. an ion is?
a) an atom that has most or gained electrons.

b) an atom that has most or gained neutrons.

c) one or more atoms that have lost or gained electrons.

d) an atom that has most or gained protons.

Ion, any atom or group of atoms that bears one or more positive or negative electrical charges.

so C is right answer my guess

Ion, any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations; negatively charged ions, anions.

Explanation:

Hope it is helpful

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.