One of the 103 known chemical substances that cannot be broken down further without changing its chemical properties. Some examples include arsenic, cadmium, lead and mercury.

The term "element" was found in the following pages:

Material database: International Atomic Energy Agency (IAEA) - IAEA-313 226Ra, Th and U in Stream Sediment
Material database: Canadian Certified Reference Materials Project (CCRMP) - CZN-3 Zinc Concentrate
Sample preservation for speciation analysis - General recommendations | EVISA's News
Directory of scientists: László Abrankó
Link database: Austria: University of Graz, IfC, Environmental and Trace Element Analysis
Antimony 2011: 2nd International Workshop on Antimony in the Environment | EVISA's Agenda of Events
Component database: Glass Expansion - ICP Fully Demountable Torches
Material database: National Institute of Standards and Technology (NIST) - SRM 1648a - Urban Particulate Matter
Component database: Glass Expansion - IsoMist - Programmable Temperature Spray Chamber
Elusive Hg(IV) species has been synthesized under cryogenic conditions | EVISA's News
IX ISTERH Conference | EVISA's Agenda of Events
Link database: Mineral Information Institute: Aluminum
Material database: IRMM - Institute for Reference Materials and Measurements - IRMM-804 Rice Flour
Material database: IRMM - Institute for Reference Materials and Measurements - BCR-144R - Sewage Sludge
Frontiers in Environmental Geoscience 2011 | EVISA's Agenda of Events
Instrument database: jas - joint analytical systems GmbH - Atomic Emission Detector - AED
26th Annual Conference of the German Society of Minerals and Trace Elements (GMS) | EVISA's Agenda of Events
Link database: Chemical Fact Sheet: Tin
Solid-phase extraction in speciation analysis | EVISA's News
Instrument database: Analytik Jena AG - contrAA® 800 - Series of Atomic Absorption Spectrometers