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Chemical element

Definition:

A substance which cannot be separated into its constituent parts and still retains its chemical identity. For example, sodium (Na) is an element.

Source: US EPA Drinking Water Glossary 

More:

For more information on the table of chemical elements see:

WebElements Periodical table of elements 

Related words:

Elemental mercury

Translation(s):

Deutsch: Chemisches Element
Español: Elemento químico
Français: Elément chimique

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