Argon is widely used as an inert shielding gas in gas tungsten arc welding to prevent hot metal from reacting with components of the air.
Explain, by referring to its electronic structure, why argon is extremely unreactive.
Practise Edexcel GCSE Chemistry Group 0 with exam-style questions for Foundation and Higher tier. 30 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.