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-Temperature of 450°C

• Pressure of 2 atm

• Vanadium(V)oxide catalyst.

Al³⁺ + 3e^- → Al 2O^2- → O₂ + 4e^-

Na is a group 1 metal and Cl is a group 7 non-metal so they form an ionic bond.

So for GCSE the key to this question is in the periodic table: Note drawing the atoms can be helpful to show the shells. 

F: 2,7

Cl: 2,8,7

Firstlet's look up Flurorine (symbol F in th...

Positive and negative ions attract one another and bind together forming a new substance. This is called ionic bonding. It is usually between a positive metal ion which i...