Periodic trends in atomic radius, ionisation energy, melting point and electrical conductivity across Period 3, and reactions of the elements, oxides and chlorides.
Trends across Period 3 (Na → Ar)
Atomic radius decreases — increasing nuclear charge, same shielding, electrons pulled in.
First ionisation energy generally increases (with dips at Al and S, as in Chapter 1).
Electrical conductivity: high for metals (Na, Mg, Al — more delocalised electrons), peaks at Al, then giant covalent Si (semiconductor), and zero for the molecular/atomic non-metals.
Viewing only
This content is free to read on superexams.com and cannot be printed or downloaded.
Read the full note, free
Create a free account to read this note in full. Every free account gets 2 complete revision notes, no card needed.