Review of the basics Ch 1 Atomic Physics

􀀁 The constituent particles forming an atom are:
• Proton
• Neutron
• Electron
Protons and neutrons are known as nucleons and they form the
nucleus.
􀀁 Atomic number Z
Number of protons and number of electrons in an atom.


􀀁 Atomic mass number A
Number of nucleons in an atom,
where
• Z is the number of protons (atomic number) in an atom.
• N is the number of neutrons in an atom.