A mass of protons and neutrons. Hope this helps. Abby (I'm really awesome)
Answer:
burning a paper is chemical change
C. The mass of an atom is greater than the combined masses of an atom's protons and electrons.
Existence of a neutron is predicted by Rutherford in 1920. So he explained difference between an atomic mass and an atomic number.
Answer:
42 hope it helped !!!!!!!!!!!!
Answer:
affects the equilibrium content
