Well if the candle lost half of its mass, and they are asking where the other half went. Most likely it is still hardened wax because the it says that you're candle lost half of its mass that means half is gone and the other half is still there. The chemical change would be liquid, and the chemical property would be Wax Vapour that is what i found.
-Hope it helps, if it does not help sorry.
True:
They are Nobel gassed! They are un-reactive because there outer shell (valence) is completely full. This means they do not want to lose or gain on electron so they do not react.
<span>Some of them remained in space, some ended up in the gas giants, Jupiter, Saturn, etc. A good percentage ended up in the sun</span>
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