Question

which scientists research led to the construction of an atomic model in which a positively charged core exists in the middle of mostly empty space, the model most closely resembling our modern model of the atom?
a) thomson
b) crookes
c) millikan
d) rutherford

Explanation:

• Thomson proposed the "plum - pudding" model, which is different from the described model.
• Crookes' work was mainly related to cathode rays.
• Millikan's famous experiment was the oil - drop experiment to measure the charge of an electron.
• Rutherford's gold - foil experiment led to the nuclear model of the atom. In this model, there is a positively charged nucleus (core) at the center, and the atom is mostly empty space (with electrons orbiting around the nucleus), which closely resembles the modern model of the atom.

Answer:

D. Rutherford