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:

Link database: FOEN: Antimony in Switzerland
Component database: SCP Science - PlasmaFORM ICP-MS Cones
Material database: IRMM - Institute for Reference Materials and Measurements - BCR-146R - Sewage sludge (industrial origin)
Material database: RECIPE Chemicals + Instruments GmbH - ClinChek 8840 Whole blood, lyophilized, trace elements level I: LOT 445
Component database: Glass Expansion - SeaSpray concentric nebulizer
Component database: Glass Expansion - DuraMist - Nebulizer for routine high precision HF analyses
ICOBTE 2011: 11th International Conference on the Biogeochemistry of Trace Elements | EVISA's Agenda of Events
Mercury 'speciation analysis' by using thermal desorption analysis | EVISA's News
Chromium Isotope Ratio as a Tool to Track the Redox State of the Earth | EVISA's News
Component database: Photron Pty. Ltd. - 37mm Diameter Hollow Cathode Lamps
Directory of scientists: GŁnther Weber
Material database: National Institute of Standards and Technology (NIST) - SRM 81a - Glass Sand
Link database: NIH: Dietary Supplement Fact Sheet: Iodine
New arsenic compounds found in herring | EVISA's News
Company database: Elemental Analysis Inc.
Directory of scientists: Doris Kuehnelt
European Legislation related to Speciation | EVISA's News
New quick test for methylmercury | EVISA's News
Link database: Chemical Fact Sheet: Silicon
Material database: National Institute of Standards and Technology (NIST) - SRM 955c - Toxic Elements in Caprine Blood /Level 3