گروه شیمی آموزش وپرورش صالح آباد خراسان

         Says one atom to the other, "Hey! I think I lost an electron

         The other says, "Are you sure

         "Yes, I'm positive

         If you're not part of the solution, you're part of the precipitate

        A neutron walks into a restaurant and orders a couple of cokes

          As she is about to leave, she asks the waiter how much she owes

         The waiter replies, "For you, No Charge