Multiple Choice
In a simplified model of subatomic particles, what is the relative mass of an electron compared with a proton (proton mass )?
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4. Atoms and Elements
Subatomic Particles (Simplified)
Multiple Choice
In introductory chemistry, what is the approximate mass of a neutron?
A
About g (approximately amu)
B
About g (approximately amu)
C
About g (approximately amu)
D
About g (approximately amu)
Verified step by step guidance1
Understand that the mass of a neutron is typically expressed in grams or atomic mass units (amu), where 1 amu is defined as 1/12 the mass of a carbon-12 atom.
Recall that the neutron is a subatomic particle found in the nucleus of an atom, and its mass is very close to that of a proton, approximately 1 amu.
Note that 1 amu is approximately equal to \(1.66 \times 10^{-24}\) grams, which is a useful conversion factor between atomic mass units and grams.
Use this conversion to estimate the mass of a neutron in grams by recognizing that the neutron's mass is about 1 amu, so its mass in grams is about \(1 \times 1.66 \times 10^{-24}\) g.
Compare the given options by matching the order of magnitude and approximate value to identify the correct mass of a neutron as about \(1 \times 10^{-24}\) grams (approximately 1 amu).
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