The nucleus consisting of Protons and Neutrons surrounded by one to several "shells" of orbiting electrons. The numbers of protons and neutrons for each element can be found in the Periodic Table of elements.
The electrons, are the negatively charged particles that are part of an atom. They hang out in what is called an electron cloud around the nucleus of the atom. We might further say that those electrons exist in what we term electron shells, and within energy levels within those shells.
It varies on the element of the atom.
The only subatomic particles that exist in an atom are protons, neutrons, and electrons.
Within an atom, the electron is the negatively charged particle. Electrons exist outside the atom's nucleus in different energy levels. Electrons are extremely small, with a mass equal to about 1/2000 that of protons and neutrons.
Electromagnetic forces exist between particles, such as protons and electrons, which hold atoms together. Strong nuclear forces also act between particles within the nucleus of an atom, binding protons and neutrons together.
Within an atom, the proton is the particle with the positive charge. Protons exist in the nucleus (center) of the atom. The number of protons in an atom's nucleus determines what type of element you have, and the periodic table is organized in order of increasing atomic number, which is the proton count.
Some particles can cross easily the atom.
Protons and neutrons are the subatomic particles found within the nucleus of an atom. Electrons are found outside the nucleus in electron clouds.
Positively charged particles in the nucleus of an atom are protons.
Particles are smaller
In the atom these particles are the electrons.
Protons and neutrons form the nucleusof the atom with electons orbiting it