Which of the following particles has the least mass?

Which of the following particles has the least mass?

Correct Answer: Electron

Step 1: Understand that particles like protons, neutrons, and electrons are the building blocks of atoms.
Step 2: Know that protons and neutrons are found in the nucleus of an atom and have a larger mass.
Step 3: Recognize that electrons are much smaller and orbit around the nucleus.
Step 4: Compare the masses: Protons have a mass of about 1 atomic mass unit (amu), neutrons also have about 1 amu, while electrons have a mass of about 0.0005 amu.
Step 5: Conclude that since electrons have a much smaller mass than protons and neutrons, they have the least mass.

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