Thomson realized that the accepted model of an atom did not account for negatively or positively charged particles. Therefore, he proposed a model of the atom which he likened to plum pudding. ... Rutherford with the assistance of Ernest Marsden and Hans Geiger performed a series of experiments using alpha particles.
1.2*104 is 12000 it is easy just try ur best
58.7 %
Please correct me if I’m wrong. :)
Answer:
The answer would either be Carbon or Silicon.
Explanation:
