To find the number of neutrons, subtract the number of protons from the mass number. number of neutrons=40−19=21.
– liquids, solids or gases – are made up of atoms and molecules that are in constant motion.<span> The theory also states that collisions between atoms and molecules are elastic</span>
Answer:
Number of neutrons is equal to 148.
Answer:
both spheres have a positive charge
This would be the molar mass.
