Which of the above elements have the most pronounced non-metallic properties

Which of the above elements have the most pronounced non-metallic properties: phosphorus, aluminum, silicon, sulfur, fluorine, chlorine?

The periodic system will help us to answer this question. The non-metallic properties of elements are increased:

1) in periods – from left to right;

2) in groups – from bottom to top.

It is easy to remember if you focus on fluorine (F) – it is the most active non-metal.

Let’s arrange these elements in order of increasing their non-metallic properties:

aluminum (Al) – silicon (Si) – phosphorus (P) – sulfur (S) – chlorine (Cl) – fluorine (F)