electron
An electron is the particle that moves around the nucleus of an atom in specific energy levels or orbitals.
The electron
Electrons move around outside the nucleus of an atom. They are negatively charged subatomic particles that orbit the positively charged nucleus in specific energy levels.
Assuming that's the nucleus of an atom, the answer is "electrons". They are in "clouds", sort of, around the nucleus of atoms.
An atom contains protons, neutrons, and electrons, electrons being the one that moves around the nucleus. The other two are in the nucleus.
The electron.
Electrons move around the nucleus of an atom. Electrons have a negative charge.
The negative particle that circles the nucleus is the electron.
electrons
the electrons revolve around the nucleus which is in the center of the atom, they revolve around it in 7 imaginary energy levels.
An orbit is the path around the nucleus of an atom. an electron generally moves along this orbit.
electrons