Question detail
How did Chadwick's work change the understanding of atomic mass?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Atoms and isotopes
Question
- A. It showed that mass is only in protons.
- B. It introduced the concept of isotopes.
- C. It confirmed that neutrons contribute to atomic mass.
- D. It eliminated the need for electrons in mass calculations.
Answer
The correct answer is C: It confirmed that neutrons contribute to atomic mass..
Explanation
The correct answer is C: It confirmed that neutrons contribute to atomic mass.. This supports the learning objective "Describe how Chadwick's work provided evidence for the neutron." in The development of the model of the atom because it uses the correct atomic and nuclear radiation relationship for Atoms and isotopes. The other options are less suitable because they do not match the required The development of the model of the atom idea: It showed that mass is only in protons.; It introduced the concept of isotopes.; It eliminated the need for electrons in mass calculations..
Common mistake
Chadwick's Contribution
Students often confuse Chadwick's discovery of the neutron with the discovery of the proton.
Remember that Chadwick identified the neutron as a neutral particle in the nucleus, while protons were discovered earlier by Rutherford.
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