Groups and periods show trends in physical properties that, in some cases, repeat periodically.
Vertical and horizontal trends in the periodic table exist for atomic radius, ionic radius, ionization energy, electron affinity and electronegativity.
Trends in metallic and non-metallic behaviour are due to the trends above.
Applications and skills
Prediction and explanation of the metallic and non-metallic behaviour of an element based on its position in the periodic table.
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).
In Chapter 5.2