Which of the following experimental observations proved that the idea of matter and mass being evenly distributed in an atom was flawed?

A. Less than 1% of the alpha particles went un-deflected through the gold foil.

B. Less than 1% of the alpha particles were deflected by angles greater than 90°.

C. The beam from the negative electrode was deflected by electrically charged rods.

D. The beam from the negative electrode cast a shadow on the positive electrode.

Question

Chemistry

Oompa Loompa

9 February, 18:41

Which of the following experimental observations proved that the idea of matter and mass being evenly distributed in an atom was flawed?

A. Less than 1% of the alpha particles went un-deflected through the gold foil.

B. Less than 1% of the alpha particles were deflected by angles greater than 90°.

C. The beam from the negative electrode was deflected by electrically charged rods.

D. The beam from the negative electrode cast a shadow on the positive electrode.

+3

Answers (2)

Know the Answer?

Melody Haynes · Answer 1

B. Less than 1% of the alpha particles were deflected by angles greater than 90°.

Explanation:

In Rutherford's gold foil experiment most of the alpha particles pass undeflected which proved that most of the atom is empty. Less than 1% of the alpha particles were deflected by angles greater than 90°. This proved that the entire mass of the atom is confined to a small space which is highly dense.

Ally Johnston · Answer 2

A. Less than 1% of the alpha particles went un-deflected through the gold foil.