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
44 exam-style questions on Edexcel GCSE Chemistry 7.3 Group 0, covering 7.3.1 The noble gases. Each one has a worked solution and a mark scheme showing where the marks go.