Probing the atom
1.[2p] Thomson found that the charge-to-mass ratio of cathode rays did not depend on the gas in the tube or the metal of the electrodes. What did that show?
Thomson found that the charge-to-mass ratio of cathode rays did not depend on the gas in the tube or the metal of the electrodes. What did that show?
Correct
The answer is: The particles were a component of all matter rather than of any one substance
The answer is: The particles were a component of all matter rather than of any one substance
The answer is: The particles were a component of all matter rather than of any one substance
2.[2p] In Geiger and Marsden's experiment roughly one alpha particle in 8000 was deflected through more than 90 degrees. Why is that fatal to the plum pudding model?
In Geiger and Marsden's experiment roughly one alpha particle in 8000 was deflected through more than 90 degrees. Why is that fatal to the plum pudding model?
Correct
The answer is: A diffuse positive charge cannot produce a force large enough to reverse an alpha particle
The answer is: A diffuse positive charge cannot produce a force large enough to reverse an alpha particle
The answer is: A diffuse positive charge cannot produce a force large enough to reverse an alpha particle
3.[1p] Rutherford's model was accepted mainly because the number of large-angle deflections was surprising.
Rutherford's model was accepted mainly because the number of large-angle deflections was surprising.
The answer is: False
Correct
4.[1p] The nucleus is roughly how many times smaller in radius than the atom that contains it? Give the order of magnitude as a power of ten.
The nucleus is roughly how many times smaller in radius than the atom that contains it? Give the order of magnitude as a power of ten.
CorrectNot quite: 100000
5.[2p] What problem did Chadwick's neutron solve?
What problem did Chadwick's neutron solve?
Correct
The answer is: Nuclear mass was roughly twice what the nuclear charge could account for
The answer is: Nuclear mass was roughly twice what the nuclear charge could account for
The answer is: Nuclear mass was roughly twice what the nuclear charge could account for
6.[2p] Chlorine is about 75.8% chlorine-35 and 24.2% chlorine-37. What relative atomic mass follows, to one decimal place?
Chlorine is about 75.8% chlorine-35 and 24.2% chlorine-37. What relative atomic mass follows, to one decimal place?
CorrectNot quite: 35.5