1) Components of atoms 2) Helium pair 3) Nucleus occupants 4) Parts of atoms 5) Positively charged particles 
Stable elementary particles having the smallest known positive charge, found in the nuclei of all elements. The proton mass is less than that of a neutron. A proton is the nucleus of the light hydrogen atom, i.e., the hydrogen ion. ... (12 Dec 1998) ... 
Positively charged particles forming part of atomic nuclei. 3 quarkhadrons
Positively charged particles forming part of atomic nuclei. 3 quarkhadrons.
particles of an atom that are positively charged and are located in the nucleus
Small particles of an atom
positively charged subatomic particles that orbit the nucleus of an atom
particles within the nucleus of an atom that carry a positive charge