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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: 9.1Γ—10βˆ’31 kg
      2. Proton: 1.67Γ—10βˆ’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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