Lead and mercury are two pollutants in the environment. From information about them in the periodic table, determine why they are called heavy metals?

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Atul Chhotray Profile
Atul Chhotray answered
The atomic weights of Lead and Mercury are approx. 207 g / mol and 200 g / mol respectively. Compare this with the weigh of other metals in particular d block ones we observe that they are 4-5 times more heavy and hence the name heavy elements.
Anonymous Profile
Anonymous answered
These are typical metals found in contaminated land.
Pollutants are often grouped together in the group you mention called "heavey metals".

This group contains metals such as chromium, manganese and nickel. .  .which aren't hat heavey, so I don't know iof the use of this phrase has been corrupted over the years but, when people use the phrase "heavey metals" with regard to the environment, read "toxic metals".

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