Periodicity examines the trends in chemical and physcial properties across and down the periodic table of elements. The trends are 'periodic', in that they repeat themselves. The periodic table of elements is arranged in order of proton number, and in accordance with our model of the electronic structure of atoms.

  • Periodic table

    This section explains the classification of elements in the periodic table. The arrangement of an element in the periodic table helps to predict its electron configuration. Practise with the questions to confirm your understanding. Make sure you use the gr

  • Periodic trends

    Periodicity refers to the pattern in the change in the properties of elements across a period. The position of an element in the Periodic Table allows scientists to make predictions about its physical and chemical properties. The fundamental principles cov