This Study Mind Tutorial covers the following specification points:

Edexcel: 1.25

1.25. understand reasons for the trends in the following properties of the elements from periods 2 and 3 of the Periodic Table:

(i) the melting and boiling temperatures of the elements, based on given data, in terms of structure and bonding

(ii) ionisation energy based on given data or recall of the plots of ionisation energy versus atomic number