A company supplies helium gas for filling party balloons. Helium is chosen instead of other gases for this purpose. Which property of helium makes it most suitable for this use?

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Question

A company supplies helium gas for filling party balloons. Helium is chosen instead of other gases for this purpose. Which property of helium makes it most suitable for this use?

Accepted Answer

It has a lower density than air and is non-flammable — Award 1 mark for identifying that helium's low density allows balloons to float, and its non-flammable nature makes it safe. B is incorrect because nitrogen and oxygen are the most abundant gases in the atmosphere, not helium. C is incorrect because helium has a very low boiling point (–269°C). D is incorrect because helium is unreactive and does not form compounds.

Answer

It is the most abundant gas in the atmosphere

Answer

It reacts with oxygen to form stable compounds

Answer

It has a high boiling point

Answer

It has a lower density than air and is non-flammable

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