Filaments in classic incandescent light bulbs are made from tungsten metal. When the light bulb is switched on, the tungsten filament becomes extremely hot and glows.
To prevent the hot filament from reacting and burning out, the bulb is filled with argon gas rather than air.
Which property of argon makes it suitable for this use?
argon has a low boiling point
argon conducts electricity
argon is unreactive
argon is less dense than air
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.