What is the correct order of increasing density?

(Density = mass/volume) Arrange the following in order of increasing density - air, exhaust from chimneys, honey, water, chalk, cotton and iron. The increasing order of density is air < exhaust from chimney < cotton < water < honey < chalk < iron.

Explanation:

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nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.