Atoms, Molecules and Compounds (Isotopes)

State the relative charges and approximate relative masses of protons, neutrons and electrons
Define proton number (atomic number) as the number of protons in the nucleus of an atom
Define nucleon number (mass number) as the total number of protons and neutrons in the nucleus of an atom
Use proton number and the simple structure of atoms to explain the basis of the Periodic Table, with special reference to the elements of proton number
Define isotopes as atoms of the same element which have the same proton number but a different nucleon number
Understand that isotopes have the same properties because they have the same number of electrons in their outer shell
State the two types of isotopes as being radioactive and non-radioactive
State one medical and one industrial use of radioactive isotopes
Describe the build-up of electrons in ‘shells’ and understand the significance of the noble gas.
electronic structures and of the outer shell electrons.
Explain Inertness of group zero elements.