Trends of Period 3 Elements: Melting Point (AQA A-Level Chemistry): Flashcards

Increase, peak at $Si$, then sharp decrease

Increase

More delocalised $e^-$; smaller ions; stronger metallic bonds

Silicon ($Si$)

Giant covalent structure with strong covalent bonds

Weak van der Waals' forces

Sulfur ($S_8$)

Largest molecules, most $e^-$, strongest van der Waals'

Individual atoms

Argon ($Ar$)