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What do you mean by "heaviest"? If you have a lot of feathers, it weighs more than a little bit of lead! There are two ways to interpret this question. One is, "Which is the element with the highest atomic weight?", and "What is the element with the highest density?"

The element with the highest atomic weight is the heaviest for the same number of atoms, and the most dense element is the heaviest element for the same volume of material.

The answer is different depending on the interpretation, so I'll give both answers.

Lead has a larger atomic weight than mercury. The atomic weight of lead is 207.2 grams per mole, while the atomic weight of Mercury is 200.59.

However, mercury is more dense than lead. The density of mercury is 13.53 grams per cm3, and the density of lead is only 11.4 grams per cm3.

So if you had the same number of atoms of each, the lead would be heavier. If you had the same volume of each, the mercury would be heavier!

See the Related Questions below for more information about the most dense elements.

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12y ago

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Related Questions

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