The baisc consept of an atom is a nucleus of protons and neutorons with electrons orbitting around it
If you're referring to the nucleus of an atom, the answer is electrons.
The # of electrons is the same are the # of protons.
an atom
It depends on the atom you are reffering to, but to find the electrons take away the number of protons from the mass number of the atom.
is a compound
Use the Related Question for how to find the number of protons and electrons in an atom and then add up the number of each atom for each atom in the molecule.
electron cloud
in an atom of neutral charge, the number of electrons will be the same as the number of protons, or the atomic number.
protrons, neutrons, electrons
Orbiting around the nucleus.
circuling the nucleus and the protons
In a neutral atom, the number of electrons is equal to the number of protons of the nucleus.