GCSE Additional Science - Physics

GCSE Additional Science - Nuclear Physics 

• Atoms are made up of protons, neutrons and electrons. 
• There are protons and neutrons in the nucleus and there are electrons in the outer shells which are also called 'energy levels'. 
• The atomic number is the proton number. 
• The mass number is the nucleon number. 
• An isotope has the same number of protons and different numbers of neutrons. 

Ionising radiation: 

• An alpha particle is equivalent to a helium nucleus which is made up of…