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セレン

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Also known as Se, element 34, 34Se

原子番号34の元素

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

Article · 日本語

セレン（英: selenium [sɨˈliːniəm]、独: Selen [zeˈleːn]）は元素記号が Se である原子番号34の元素。カルコゲン元素の一つ。ヒトの必須元素の1つでもある。

Abstract from DBpedia / Wikipedia · CC BY-SA

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