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Decomposition of Hydorgen peroxide solution, H₂O₂, using Manganese (IV) oxide as a catalyst. Effervescence is observed as the oxygen gas is evolved and the gas can be collected by di...

-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...