What do you know about two atoms if their atomic numbers are different

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

The nuclear fission process releases neutrons and question 27 options: alpha particles electrons energy beta particles

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space