Respuesta :

12.The plum pudding of the model the atom had negatively-charged electrons embedded within a positively charged sup.
13. How much smaller was the nucleus, than the atom itself, according to Rutherford? After tracing many particles and examining the patterns, Rutherford deduced that the atom must have nearly all its mass, and positive charge, in a central nucleus about 10,000 times smaller than the atom itself