Multiple Choice
Which subatomic particles are located in the nucleus of an atom?
2. Atoms & Elements
Subatomic Particles
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Which of these statements about the mass of subatomic particles is true?
A
Electrons have more mass than protons.
B
The mass of a proton is approximately equal to the mass of a neutron.
C
The mass of an electron is approximately equal to the mass of a proton.
D
Neutrons have no mass.
Verified step by step guidance1
Understand the basic properties of subatomic particles: protons, neutrons, and electrons. Protons and neutrons are found in the nucleus of an atom, while electrons orbit the nucleus.
Recall that protons and neutrons have similar masses, which are significantly larger than the mass of an electron. The mass of a proton is approximately 1 atomic mass unit (amu), and the mass of a neutron is also about 1 amu.
Recognize that the mass of an electron is much smaller than that of protons and neutrons. It is approximately 1/1836 of the mass of a proton.
Evaluate the given statements: 'Electrons have more mass than protons' is incorrect because electrons have much less mass than protons. 'The mass of an electron is approximately equal to the mass of a proton' is also incorrect for the same reason.
Consider the statement 'The mass of a proton is approximately equal to the mass of a neutron' as true, since both have similar masses. The statement 'Neutrons have no mass' is incorrect because neutrons do have mass, similar to protons.
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