QuestionApril 17, 2026

4. The mass of an electron is A. not significant to the overall mass of the atom B. equal to the mass of the proton and the neutron C. higher than the mass of the proton or the neutron D. None of the above

4. The mass of an electron is A. not significant to the overall mass of the atom B. equal to the mass of the proton and the neutron C. higher than the mass of the proton or the neutron D. None of the above
4. The mass of an electron is A. not significant to the overall mass of the atom B. equal to the mass of the proton and the neutron C. higher than the mass of the proton or the neutron D. None of the above

Solution
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Answer

A. not significant to the overall mass of the atom Explanation 1. Compare electron mass with atomic particles Electron mass ≈ 9.11 \times 10^{-31} kg; proton mass ≈ 1.67 \times 10^{-27} kg; neutron mass similar to proton. Electron mass is much smaller and negligible to atom's overall mass. 2. Eliminate incorrect options B is false because electron mass is much smaller; C is false because electron mass is lower; A is correct description; D is false.

Explanation

1. Compare electron mass with atomic particles <br /> Electron mass ≈ $9.11 \times 10^{-31}$ kg; proton mass ≈ $1.67 \times 10^{-27}$ kg; neutron mass similar to proton. Electron mass is much smaller and negligible to atom's overall mass. <br />2. Eliminate incorrect options <br /> B is false because electron mass is much smaller; C is false because electron mass is lower; A is correct description; D is false.
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