Question

ernest rutherford proposed that at the center of each atom exists a very charged nucleus.

Explanation:

Ernest Rutherford's gold - foil experiment led him to propose the nuclear model of the atom. In this model, the atom has a small, dense, positively charged nucleus at its center. This was a significant departure from the earlier plum - pudding model. The positive charge of the nucleus comes from the protons it contains.

Answer:

positively