Multiple Choice
In a simplified model of the atom, which subatomic particle has a positive charge?
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4. Atoms and Elements
Subatomic Particles (Simplified)
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In a simplified model of the atom, which subatomic particles account for most of the atom's mass?
A
Electrons only
B
Neutrons and electrons
C
Protons and electrons
D
Protons and neutrons
Verified step by step guidance1
Recall that an atom is composed of three main subatomic particles: protons, neutrons, and electrons.
Understand that the mass of an electron is much smaller compared to protons and neutrons; specifically, electrons have about 1/1836 the mass of a proton.
Recognize that protons and neutrons are located in the nucleus of the atom, which contains nearly all of the atom's mass.
Note that electrons orbit the nucleus and contribute very little to the overall mass of the atom.
Therefore, conclude that protons and neutrons together account for most of the atom's mass.
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