Question

X-ray source Here is a simulation of a famous scientific experiment. Spray the oil by clicking the mister), then adjust the voltage until you can get an oil drop to be suspended motionless between the+ and - electrical plates. oil mister small hole (a) Who performed this experiment? +plate 30 O Niels Bohr O Robert Millikan rm pe 20 JJ, Thompson Emest Rutherford 10 O - plate 0. (b) What was determined from this experiment? voltage: o v O The charge of an electron. O The existence of neutrons. O That atoms have a positive nucleus That mass is conserved in chemical reactions.

Answer 1

The oil drop experiment was performed by Robert A. Millikan and Harvey Fletcher in 1909 to measure the electric charge of the electron. So correct option for Part A is b and for Part B is a.

Correct option for Part C is c,d as Rutherford disapproved Thomson's plum pudding model by conducting the gold foil experiment and stating that only way the alpha particles could be deflected backwards if most of the mass of atom is concentrated in nucleus.

While Solar system of atom was given by Neils Bohr.