Hydrogen

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Hydrogen topic overview

The analysis highlights History, Applications and Standards as prominent areas in the source structure around Hydrogen.

Related topics: 417
Source areas: 7
Connected nodes: 424
Extracted relationships: 161
Related term clusters: 103
Bridge connections: 424

What this topic covers Research coverage

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.

Overview · 229 topics

Applications · 65 topics

Chemistry · 39 topics

History · 35 topics

Occurrence · 25 topics

Production and storage · 21 topics

Safety and precautions · 3 topics

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.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

1H: 99.9855%
2H: 0.0115%
3H: trace
Appearance: Colorless gas
Atomic number (Z): 1
Block: s-block

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Hydrogen

3Acid–base reaction · Solubility · Crystal lattice

3Excited state · Joule per mole · Bond dissociation energy

3Synthesis gas · Methanol · Syngas

3Organic compound · Hydrocarbon · Chemical compound

3Aqueous solution · PH · Logarithmic scale

3Hyperfine structure · Spin (physics) · Nuclear isomer

Explore all related topics Closing gaps

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.

Overview

Applications

Safety and precautions

For the semantics nerds

You can skip this section if you’re here for content ideas and keyword inspiration.

Advanced semantic analysis

How Hydrogen connects Entity context

The extracted context around Hydrogen shows recurring relationship patterns in the source. For example, Hydrogen → Applications, Beyond, Coolant, Cryogenic, Dayton, E949, Food, Leak, Liquid H2, Ohio, Pure, Shielding Another extracted example is Hydrogen → According, Diatomic, Edward Daniel Clarke, François Isaac, H2, James Clerk Maxwell's, James Dewar, One, Rivaz, The Döbereiner's. Use these groups to spot repeated connection types before inspecting the individual relationships.

Top relations

related to Niche and evolving uses · 12

Hydrogen → Applications, Beyond, Coolant, Cryogenic, Dayton, E949, Food, Leak, Liquid H2, Ohio, Pure, Shielding

related to 19th century · 10

Hydrogen → According, Diatomic, Edward Daniel Clarke, François Isaac, H2, James Clerk Maxwell's, James Dewar, One, Rivaz, The Döbereiner's

related to 20th century · 8

Hydrogen → Bohr, Due, Earth, Gilbert, Lewis, LiH, Moers, Sun

related to Terrestrial · 8

Hydrogen → Australia, Despite, Earth's, Elemental, France, H2, Large, Mali

related to Protons and acids · 7

Hydrogen → Brønsted, Even, H3O, H9O4, Lower, Lowry, Otherwise

related to 18th century · 6

Hydrogen → Anaerobic, Antoine Lavoisier, Cavendish's, Henry Cavendish, Laplace, Lavoisier

related to Nickel–hydrogen battery · 6

Hydrogen → H2, Hubble Space Telescope, Mars Global Surveyor, Mars Odyssey, May, The International Space Station

related to Storage · 6

Hydrogen → BH3, H2, H2-equivalents, H3N, If H2, Liquefaction

related to Cosmic · 5

Hydrogen → Big Bang, II, Lyman-alpha, MHz, Radiation

related to Hydrogenation · 5

Hydrogen → H2, Haber, Hydrogenation, Methanol, N2

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

gas h2 water used also compounds production produced energy proton form carbon reaction deuterium fuel molecules electron metals temperature low

Hydrogen relationships Subject–Predicate–Object triples

TTTA extracted 161 structured relationships around Hydrogen. Examples in this analysis include Hydrogen → 1H → 99.9855% and Hydrogen → 2H → 0.0115%. The table shows each extracted connection, where it came from and its confidence.

Subject	Predicate	Object	Confidence	Src
Hydrogen	1H	99.9855%	1.00	infobox
Hydrogen	2H	0.0115%	1.00	infobox
Hydrogen	3H	trace	1.00	infobox
Hydrogen	Appearance	Colorless gas	1.00	infobox
Hydrogen	Atomic number (Z)	1	1.00	infobox
Hydrogen	Block	s-block	1.00	infobox
Hydrogen	Boiling point	(H2) 20.271 K (−252.879 °C, −423.182 °F)	1.00	infobox
Hydrogen	CAS Number	12385-13-6 1333-74-0 (H2)	1.00	infobox
Hydrogen	Covalent radius	31±5 pm	1.00	infobox
Hydrogen	Critical point	32.938 K, 1.2858 MPa	1.00	infobox
Hydrogen	Crystal structure	hexagonal (hP4)	1.00	infobox
Hydrogen	Density (at STP)	0.08988 g/L	1.00	infobox
Hydrogen	Discovery and first isolation	Henry Cavendish (1766)	1.00	infobox
Hydrogen	Electron configuration	1s1	1.00	infobox
Hydrogen	Electronegativity	Pauling scale: 2.20	1.00	infobox
Hydrogen	Electrons per shell	1	1.00	infobox
Hydrogen	Group	group 1: hydrogen and alkali metals	1.00	infobox
Hydrogen	Heat of fusion	(H2) 0.117 kJ/mol	1.00	infobox
Hydrogen	Heat of vaporization	(H2) 0.904 kJ/mol	1.00	infobox
Hydrogen	Ionization energies	1st: 1312.0 kJ/mol	1.00	infobox
Hydrogen	Lattice constants	a = 378.97 pm c = 618.31 pm (at triple point)	1.00	infobox
Hydrogen	Magnetic ordering	diamagnetic	1.00	infobox
Hydrogen	Molar heat capacity	14.418 J/(mol·K) (H) 28.836 J/(mol·K) (H2)	1.00	infobox
Hydrogen	Molar magnetic susceptibility	−3.98×10−6 cm3/mol (298 K)	1.00	infobox
Hydrogen	Named by	Antoine Lavoisier (1783)	1.00	infobox
Hydrogen	Naming	name means 'water-former' in Greek	1.00	infobox
Hydrogen	Natural occurrence	primordial	1.00	infobox
Hydrogen	Oxidation states	common: −1, +1	1.00	infobox
Hydrogen	P (Pa)	Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 15 20	1.00	infobox
Hydrogen	Period	period 1	1.00	infobox

Related concept clusters Related term clusters

The concept neighborhoods around Hydrogen bring nearby vocabulary together. In this analysis, examples include Water, Produced and H2. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

water
- Electrolysis
- Compounds
- Many
- Hydrogen
- Gas
- Produced
- Hydrocarbons
- Iron
- H2
- Reaction
- Also
- Methane
organic compounds
- Hydrocarbons
- Known
- Water
- Deuterium
- Dihydrogen
- Hydride
- Electron
- Element
- Hydrogen
- H2
- Carbon
- Used
ionic compounds
- Hydrocarbons
- Known
- Water
- Deuterium
- Dihydrogen
- Hydride
- Electron
- Element
- Hydrogen
- H2
- Carbon
- Used
heavy water
- Electrolysis
- Compounds
- Many
- Hydrogen
- Gas
- Produced
- Hydrocarbons
- Iron
- H2
- Reaction
- Also
- Methane
electrolysis of water
- Electrolysis
- Water
- Hydrocarbons
- Methane
- Compounds
- Many
- Hydrogen
- Process
- Gas
- Produced
- Iron
- H2
water splitting
- Electrolysis
- Compounds
- Many
- Hydrogen
- Gas
- Produced
- Hydrocarbons
- Iron
- H2
- Reaction
- Also
- Methane
water table
- Electrolysis
- Compounds
- Many
- Hydrogen
- Gas
- Produced
- Hydrocarbons
- Iron
- H2
- Reaction
- Also
- Methane
chemical compounds
- Element
- Hydrocarbons
- Known
- Water
- Deuterium
- Used
- Dihydrogen
- Hydride
- Electron
- Compounds
- Hydrogen
- H2

Connections between topic areas Semantic bridges

For Hydrogen, one of the stronger structural bridges in this analysis connects Hydrogen with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3

Hydrogen — Overview · splits 195 ⟂ 230

Hydrogen — Applications · splits 359 ⟂ 66

Hydrogen — Chemistry · splits 385 ⟂ 40

Hydrogen — History · splits 389 ⟂ 36

Hydrogen — Occurrence · splits 399 ⟂ 26

Hydrogen — Production and storage · splits 403 ⟂ 22

Hydrogen — Safety and precautions · splits 421 ⟂ 4

Map overview Semantic statistics

Hydrogen

Nodes425

Edges424

Triples161

Avg. degree2

Density0.004706

Components1

Source & methodology

TTTA analyzes the structure around Hydrogen to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History, Applications & Standards, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — Hydrogen · EN edition · Analysis: TopicsToTalkAbout

Hydrogen: History, Applications & Standards

Hydrogen topic overview

What this topic covers Research coverage

Key facts & relationships

Start with your topic. Discover where to go next.

Questions to explore

Explore all related topics Closing gaps

Overview

History

Chemistry

Occurrence

Production and storage

Applications

Safety and precautions

For the semantics nerds

Advanced semantic analysis

How Hydrogen connects Entity context

Hydrogen

Top relations

Important terminology

Important terminology

Hydrogen relationships Subject–Predicate–Object triples

Related concept clusters Related term clusters

Connections between topic areas Semantic bridges

Map overview Semantic statistics

Hydrogen

Source & methodology