Which of the following statements is correct?
Correct answer: D. Chadwick's experiment confirmed the presence of neutrons
- A. Faraday's experiments proved the existence of electrons
- B. Crookes tube experiment demonstrated the presence of electrons in the atoms
- C. Radioactivity directly confirms the presence of electrons and protons
- D. Chadwick's experiment confirmed the presence of neutrons
Explanation
Option D is correct. James Chadwick's experiment involving the bombardment of beryllium with alpha particles led to the discovery of neutrons, neutral particles with a mass similar to that of protons. These particles do not have an electric charge, which distinguishes them from protons and electrons. The other options are incorrect because Faraday's work did not directly involve electrons, Crookes' experiment did not reveal protons, and radioactivity does not directly confirm the presence of electrons and protons.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Atomic Structure
Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.