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Which of the following lists correctly identifies the three main types of subatomic particles found in atoms?
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2. Atoms & Elements
Subatomic Particles
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How does the mass of a proton compare to the mass of an electron?
A
The mass of a proton is slightly less than the mass of an electron.
B
The mass of a proton is equal to the mass of an electron.
C
The mass of a proton is slightly greater than the mass of an electron.
D
The mass of a proton is much greater than the mass of an electron.
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Recall the fundamental particles in an atom: protons, neutrons, and electrons. Each has a characteristic mass.
Understand that the mass of a proton is approximately 1 atomic mass unit (amu), which is about \(1.67 \times 10^{-27}\) kilograms.
Know that the mass of an electron is much smaller, approximately \(9.11 \times 10^{-31}\) kilograms.
Compare the two masses by dividing the mass of the proton by the mass of the electron: \(\frac{1.67 \times 10^{-27}}{9.11 \times 10^{-31}}\).
Recognize that this ratio shows the proton is roughly 1836 times more massive than the electron, meaning the proton's mass is much greater than the electron's mass.
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