Question

PLEASE HELP :)

The image shows expected results and actual results of the famous "gold foil experiment"
that was performed by a scientist we studied. Positively charged alpha particles were passed
through gold foil. Study the images above and think about what you learned about the early
models of atomic structure.

a. Explain whose model is shown in "a" and the name of the model. Include the scientist
who developed that particular model.

b. Explain the actual results shown in "b" How did the experiment prove that the
model shown in "a" is incorrect? include in your answer the name of the scientist
who conducted the gold foil experiment, and which subatomic particle he proved the
existence of

Answer 1

Answer:

a) this is the plum pudding model by J.J Thompson

b) the experiment was done by Geiger and Maderson but the credits went to Ernest Rutherford and formed the Rutherford's nuclear model.

Observations proving the plum pudding model wrong:

1) most of the alpha particles went through

so the atom consists of mostly empty space

2) A small fraction of them bended less than 90 degrees

so the nucleus has an overall positive charge

alpha is positive, so bended when they got near the nucleus' of the gold particles due to electrostatic charge

3) An even smaller fraction of the alpha particles deflected more than               180 degrees

so an atom consists of a small concentrated mass at the centre (nucleus)

Explanation:

plum pudding model- a sphere of positive gas with negative electrons embedded inside