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What is the name of the negatively charged particle (the blue spheres with the minus sign) found outside the nucleus?
Electron


What is the name of the particle in the nucleus that has no electrical charge (the light blue spheres with no signs)?
Neutron


What is the name of the particles in the nucleus that have a positive charge (the red spheres with the plus sign)?
Proton


What are the circular paths or rings called where electrons travel around the nucleus?
Electron orbit

What is a vacuum?
A space containing little to no matter.