Who is given credit for determining the charge of an electron?

• A. J. J. Thomson
• B. Robert Millikan
• C. Henri Becquerel
• D. Marie Curie
• E. Ernest Rutherford

Answer: (B)

Verified step by step guidance

1. Identify the context of the question: The problem is asking about the historical figure credited with determining the charge of an electron.
2. Understand the significance of the charge of an electron: The charge of an electron is a fundamental constant in physics and chemistry, crucial for understanding atomic structure and chemical reactions.
3. Recall the key historical experiment: The oil-drop experiment conducted by Robert Millikan in the early 20th century is the experiment that determined the charge of an electron.
4. Differentiate between the scientists mentioned: J. J. Thomson discovered the electron, but Robert Millikan is credited with measuring its charge. Henri Becquerel discovered radioactivity, Marie Curie conducted pioneering research on radioactivity, and Ernest Rutherford is known for his model of the atom.
5. Conclude with the correct attribution: Based on the historical context and the specific contribution, Robert Millikan is the scientist credited with determining the charge of an electron.