SUB ATOMIC PARTICLES

PROTONS

• POSITIVE CHARGE [+]
• THEY HAVE A MASS OF ONE [1] DALTON
• FOUND INSIDE A NUCLEUS
• UNIQUE TO AN ATOM [ THE NUMBER OF PROTONS DETERMINES AN ATOM]

ELECTRONS

• NEGATIVE CHARGE [-]
• NO MASS [INSIGNIFICANT]
• FOUND IN ORBITS/ SHELLS
• NOT UNIQUE [E.G. IONS*]
• *ION - AN ATOM WITH DIFFERENT NUMBER OF ELECTRONS*

NEUTRONS

• NO CHARGE
• THEY HAVE MASS OF ONE DALTON
• FOUND IN THE NUCLEUS
• NOT UNIQUE [E.G. ISOTOPES*]
• *ISOTOPES - AN ATOM WITH DIFFERENT NUMBER OF NEUTRONS*