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Selenium is a chemical element; it has symbol Se and atomic number 34. It has various physical appearances, including a brick-red powder, a vitreous black solid, and a grey metallic-looking form. It seldom occurs in this elemental state or as pure ore compounds in Earth's crust. Selenium (from σελήνη 'moon') was discovered in 1817 by Jöns Jacob…
The analysis highlights Characters, History, Applications and Art as prominent areas in the source structure around Selenium.
Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.
Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.
High-confidence facts extracted from structured source data. Use them as anchors for further research.
Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
The extracted context around Selenium shows recurring relationship patterns in the source. For example, Selenium → Alexander Graham Bell, Alexander Marcet, Because, Berzelius, Berzelius's, Both, Earth, Falun Mine, Gahn, Greek, Gripsholm, Hence, However, In, Johan Gottlieb Gahn, Jöns Jacob Berzelius, Marcet, Moon, Pyrite, Selenium's Another extracted example is Selenium → Alkali, Analogous, Cu, Ga, H2S, H2Se, HgSe, HSe, Illustrative, In, It, PbSe, Se2, The, These, With, ZnSe. Use these groups to spot repeated connection types before inspecting the individual relationships.
Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.
used may sulfur compounds forms copper lead also selenide se form toxic μg element acid plants high found dietary many
TTTA extracted 289 structured relationships around Selenium. Examples in this analysis include Selenium → 72Se → synth and Selenium → 74Se → 0.860%. The table shows each extracted connection, where it came from and its confidence.
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Selenium | 72Se | synth | 1.00 | infobox |
| Selenium | 74Se | 0.860% | 1.00 | infobox |
| Selenium | 75Se | synth | 1.00 | infobox |
| Selenium | 76Se | 9.23% | 1.00 | infobox |
| Selenium | 77Se | 7.60% | 1.00 | infobox |
| Selenium | 78Se | 23.7% | 1.00 | infobox |
| Selenium | 79Se | trace | 1.00 | infobox |
| Selenium | 80Se | 49.8% | 1.00 | infobox |
| Selenium | 82Se | 8.82% | 1.00 | infobox |
| Selenium | Appearance | grey metallic-looking, red, and vitreous black (not pictured) allotropes | 1.00 | infobox |
| Selenium | at T (K) | 500 | 1.00 | infobox |
| Selenium | Atomic number (Z) | 34 | 1.00 | infobox |
| Selenium | Atomic radius | empirical: 120 pm | 1.00 | infobox |
| Selenium | Block | p-block | 1.00 | infobox |
| Selenium | Boiling point | 958 K (685 °C, 1265 °F) | 1.00 | infobox |
| Selenium | Brinell hardness | 736 MPa | 1.00 | infobox |
| Selenium | Bulk modulus | 8.3 GPa | 1.00 | infobox |
| Selenium | CAS Number | 7782-49-2 | 1.00 | infobox |
| Selenium | Covalent radius | 120±4 pm | 1.00 | infobox |
| Selenium | Critical point | 1766 K, 27.2 MPa | 1.00 | infobox |
| Selenium | Crystal structure | grey: hexagonal (hP3) | 1.00 | infobox |
| Selenium | Density (near r.t.) | gray: 4.81 g/cm3 alpha: 4.39 g/cm3 vitreous: 4.28 g/cm3 | 1.00 | infobox |
| Selenium | Discovery and first isolation | Jöns Jakob Berzelius and Johann Gottlieb Gahn (1817) | 1.00 | infobox |
| Selenium | Electron configuration | [Ar] 3d10 4s2 4p4 | 1.00 | infobox |
| Selenium | Electronegativity | Pauling scale: 2.55 | 1.00 | infobox |
| Selenium | Electrons per shell | 2, 8, 18, 6 | 1.00 | infobox |
| Selenium | Group | group 16 (chalcogens) | 1.00 | infobox |
| Selenium | Heat of fusion | gray: 6.69 kJ/mol | 1.00 | infobox |
| Selenium | Heat of vaporization | 95.48 kJ/mol | 1.00 | infobox |
| Selenium | Ionization energies | 1st: 941.0 kJ/mol | 1.00 | infobox |
The concept neighborhoods around Selenium bring nearby vocabulary together. In this analysis, examples include May, Forms and Used. Use the clusters to find adjacent concepts and terminology that may deserve separate research.
For Selenium, one of the stronger structural bridges in this analysis connects Selenium with Chemical compounds. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.
TTTA analyzes the structure around Selenium to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Characters, History, Applications & Art, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.
Source: Wikipedia — Selenium · EN edition · Analysis: TopicsToTalkAbout