IB Chemistry home > Syllabus 2016 > Periodicity > Chemical properties of the elements

Syllabus ref: 3.2

The periodic table does not only show trends in physical properties, but also in chemical properties. This makes sense as the periodic table is arranged according to electronic structure and the outer, or valence, electrons are primarily responsible for chemical reactivity.


Oxides change from basic through amphoteric to acidic across a period.

Applications and skills

Discussion of the similarities and differences in the properties of elements in the same group, with reference to alkali metals (group 1) and halogens (group 17).

Construction of equations to explain the pH changes for reactions of Na2O, MgO, P4O10, and the oxides of nitrogen and sulfur with water.

In Chapter 5.3