Multiple Choice
Which element has 18 protons in its nucleus?
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4. Atoms and Elements
Subatomic Particles (Simplified)
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In a simplified model of the atom, which subatomic particle is typically described as moving the fastest?
A
Neutron
B
Proton
C
Electron
D
Nucleus
Verified step by step guidance1
Recall the three main subatomic particles: protons, neutrons, and electrons. Protons and neutrons are located in the nucleus, while electrons move around the nucleus in electron clouds or orbitals.
Understand that the mass of electrons is much smaller compared to protons and neutrons. Because of their smaller mass, electrons can move at much higher speeds to balance the forces within the atom.
Recognize that protons and neutrons are relatively heavy and confined within the nucleus, so they do not move rapidly like electrons do.
Consider the concept of atomic structure where electrons occupy energy levels and move rapidly around the nucleus, which is why they are described as the fastest moving subatomic particles.
Conclude that among the options given, the electron is the subatomic particle that typically moves the fastest in the simplified atomic model.
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