the nucleus
The number of protons in the nucleus never changes in a neutral atom. This is because the number of protons determines the element's identity.
Hydrogen proton
Particles that are never present in an atom include free electrons (outside the nucleus), neutrinos, and positrons. These particles do not form part of the structure of the atom itself.
i believe it is the nucleus.
what changes the charge of the atom
The number of protons.
Its protons. The atom changes depending on how many protons it has. See also atomic number.
no an atom is a part of a molecule.
yes, it usually is, the number of protons never changes is in an atom, the amount of neutrons and electrons do however.
neutrons
a leopard never changes its spots
The nucleus of an atom is the part that takes part in nuclear reactions. It consists of protons and neutrons, which are involved in processes such as fission and fusion. The electrons surrounding the nucleus are not typically involved in nuclear reactions.