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34 Reactive Nonmetal
Se

Selenium

RIS 0.089
Velocity
Rank#22
Co-citedIn
Physical properties
Category Nonmetal
Block p-block
State Solid
Config [Ar] 3d10 4s2 4p4
Electronegativity 2.55
Density 4.809 g/cm³
Melting 494.0 K
Boiling 958.0 K
Ionization 941.0 kJ/mol
Oxidation -2, +2, +4, +6
Discovered 1817 · Jons Jacob Berzelius
10-year trends

Research trends from the past decade for this element.

Research trends from the past decade: publication rate, citation momentum, emerging applications. A bird's-eye view of how the field has been evolving.

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Top papers of all time
Carbon · 2025 · 100th percentile for its age
Acta Dermato Venereologica · 2026 · 100th percentile for its age
Innovative Food Science & Emerging Technologies · 2025 · 99th percentile for its age
Top papers, last 5 years
Carbon · 2025 · 100th percentile for its age
Acta Dermato Venereologica · 2026 · 100th percentile for its age
Innovative Food Science & Emerging Technologies · 2025 · 99th percentile for its age
Newest papers
Acta Dermato Venereologica · 2026 · 100th percentile for its age
Journal of Power Sources · 2026 · 100th percentile for its age
Acta Biomaterialia · 2026 · 99th percentile for its age

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Selenium's history

Research intensity over time

Selenium's history

Selenium's research intensity, 1900 → today.

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Advanced visualization features

Selenium's associations

These shapes are citation clusters: groups of papers that cite each other. They show why Selenium is moving, not just that it is.

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