What would increase the mass of the Helium atom, without changing its identity? A) add a neutron
B) remove a proton
C) add a proton
D) add an electron

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water