Help needed ASAP, I will mark your answer as brainliest.

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.

Chemistry worksheet - i am not sure what they are asking for exactly?