Which of the following is NOT a conclusion of Rutherford’s alpha-particle scattering experiment?

Correct Answer: Most of the atom is empty space.

Subject: 2025

• Most of the atom is empty space.
• The positive charge is concentrated in a very small region.
• Almost the whole mass of the atom is concentrated in a very small volume.
• The radius of the nucleus is about $10^5$ times the radius of the atom.

Explanation: • <b>Key Fact</b>: The tested concept is <b>Rutherford Scattering</b>.<br>• <b>Additional Info</b>: Remember the defining fact/rule and its common exam association.<br>• <b>Why the other options are wrong</b>: They refer to different facts or concepts.<br>• <b>Exam Trick</b>: Link the keyword directly to the defining fact.<br>• <b>Final Answer</b>: The radius of the nucleus is about $10^5$ times the radius of the atom..