Question #106661. Asked by Jimboy4.
Last updated Jun 12 2021.
looney_tunes
Answer has 6 votes
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looney_tunes 19 year member
3321 replies
Answer has 6 votes.
Currently voted the best answer.
Very few substances do - they are characterized by the formation of open (usually tetrahedral) lattices as a solid. Water is the best known, along with the elements silicon, antimony, bismuth and gallium.
"Vegetable oil" is a wide-open term, which could refer to a mixture of various oils, or to a category of substances from individual vegetables - sunflower oil, safflower oil, etc. Even the single-vegetable oils are not pure substances, and unlikely to meet the requirements for expansion - I can find no evidence of any that do!