After 1911, most scientists accepted the theory that nucleus of an atom was very dense and very small and has a positive charge. what led scientists to accept this theory?

i look it up online and i'll tell you

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates