sélénium

Also known as Se, element 34, 34Se

élement chimique de numéro atomique 34 et de symbole Se

OverviewAI-generated

Selenium is a chemical element with the symbol Se and atomic number 34. Its standard chemical formula is Se, and it has a mass of 78.971. The element was discovered in 1817. It exhibits oxidation states of -2, 1, 2, and 4, and has an electronegativity of 2.55. The ionic radius is 0.50.

Physical properties include a density of 4.28, a melting point of 392, and a boiling point of 1265. The vapor pressure is 0. Safety guidelines list a time-weighted average exposure limit of 0.2 and an immediately dangerous to life or health value of 1. The NIOSH Pocket Guide ID is 0550. In digital text, it is represented by the Unicode character "硒".

Synthesized by Vinony from 31 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Chemical data

Formula: Se
Molecular weight: 78.97 g/mol
IUPAC name: selenium
SMILES: [Se]
InChIKey: BUGBHKTXTAQXES-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

50,303 papers

Effects and Impact of Selenium on Human Health, A Review.ReviewMolecules (Basel, Switzerland) · 2024Bai S, Zhang M, Tang S et al.DOI: 10.3390/molecules30010050
Selenium.ReviewJournal of toxicology. Clinical toxicology · 1999Barceloux DGDOI: 10.1081/clt-100102417
Selenium-More than Just a Fortuitous Sulfur Substitute in Redox Biology.ReviewMolecules (Basel, Switzerland) · 2023Maia LB, Maiti BK, Moura I et al.DOI: 10.3390/molecules29010120
Selenium Biofortification: A Dual-Edged Sword of Nutrition and Contamination Risk.ReviewComprehensive reviews in food science and food safety · 2025Xi Z, Chen C, Zhu D et al.DOI: 10.1111/1541-4337.70345
Selenium and brain aging: A comprehensive review with a focus on hippocampal neurogenesis.ReviewAgeing research reviews · 2025Daneshpour A, Leite MEN, Wagner KH et al.DOI: 10.1016/j.arr.2025.102898
Research Progress of Selenium-Enriched Foods.ReviewNutrients · 2023Chen Z, Lu Y, Dun X et al.DOI: 10.3390/nu15194189
Selenium action in neuro-oncology.ReviewBiological trace element research · 2014Yakubov E, Buchfelder M, Eyüpoglu IY et al.DOI: 10.1007/s12011-014-0111-8
Selenium.ReviewJournal of dairy science · 1970Hogue DEDOI: 10.3168/jds.S0022-0302(70)86356-1

via PubMed

Article · Français

Le sélénium est l'élément chimique de numéro atomique 34, de symbole Se. Ce troisième élément du groupe VI A (groupe des chalcogènes) est un non-métal. La chimie du corps simple et de ses principaux composés présente une grande analogie avec celle du soufre, mais aussi avec celle du tellure.

Abstract from DBpedia / Wikipedia · CC BY-SA