chapter 4 (the atom scientists (Democritus (theory of atomist , oldest…
the atom scientists
the existence of atom
the tiny electrons
theory of atomist
he had the discover of neutron in the late 1930s
electron by experimenting with a crookes.
parts of the atom
the number of neutrons in the the nucleus
% isotope x mass isotope 1 + % isotope4 2 x mass isotope 2
protons and neutrons have the same atomic number
the atomic number is one above
the total number of protons and neutrons in a nucleus.