Which variables did the student need to control in this investigation? Select all that apply. 1. the mass of the balls 2. the diameter of the balls 3. the height from which the balls were dropped 4. the material in the pan !I Need This Done Fast!

Because atoms of elements in the same group of thbecause atoms of elements in the same group of the periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t fe periodic table have the same number of neutrons, they have similar properties. select the best answer from the choices provided t f