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    Question

    Which of the following is the correct sequence in terms

    of increasing mass?
    A Proton, electron, alpha particle, hydrogen atom Correct Answer Incorrect Answer
    B Electron, proton, hydrogen atom, alpha particle Correct Answer Incorrect Answer
    C Hydrogen atom, proton, electron, alpha particle Correct Answer Incorrect Answer
    D Alpha particle, proton, hydrogen atom, electron Correct Answer Incorrect Answer

    Solution

    The correct order of increasing mass is:

    1. Electron: 9.1×10−31 kg
    2. Proton: 1.67×10−27 kg
    3. Hydrogen atom: Slightly more massive than a proton due to the addition of an electron.
    4. Alpha particle: Contains 2 protons and 2 neutrons, making it the heaviest among the options.

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