Protactinium

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Map view:

Zoom: 100%

More settings

Connection length 100% Label size 100% Node size 100% Line width 100% Label width 100%

Export map as:

Protactinium topic overview

The analysis highlights History and Applications as prominent areas in the source structure around Protactinium.

Related topics: 156
Source areas: 9
Connected nodes: 169
Extracted relationships: 110
Related term clusters: 34
Bridge connections: 169

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.

Chemical compounds · 37 topics

Overview · 36 topics

History · 28 topics

Occurrence · 17 topics

Isotopes · 11 topics

Applications · 9 topics

Properties · 9 topics

Precautions · 5 topics

Preparation · 4 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.

229Pa: synth
230Pa: synth
231Pa: 100%
232Pa: synth
233Pa: trace
234mPa: trace

Start with your topic. Discover where to go next.

Explore different angles and find fresh ideas to shape your next piece of content.

Protactinium

14Kazimierz Fajans · Oswald Helmuth Göhring · Half-life

13Chemical element · Chemical symbol · Atomic number

7Aristid von Grosse · Kiloelectronvolt · Crystal bar process

8Decay chain · Uranium-238 · Thorium

10Dmitri Mendeleev · Mendeleev's predicted elements · Uranium

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.

Isotopes

Occurrence

Preparation

Properties

Applications

Precautions

Bibliography

For the semantics nerds

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

Advanced semantic analysis

How Protactinium connects Entity context

The extracted context around Protactinium shows recurring relationship patterns in the source. For example, Protactinium → Crookes, Dmitri Mendeleev, Frederick Soddy, Germany, Great Britain, Greek, IV, John Cranston, Kasimir Fajans, Latin, Lise Meitner, Meitner, Mendeleev, Oswald Helmuth Göhring, Otto Hahn, Tantalum's, The IUPAC, UX, VI, William Crookes Another extracted example is Protactinium → Another, C5H5, C8H8, IV, K2C8H8, One, Pa, Similar. Use these groups to spot repeated connection types before inspecting the individual relationships.

Top relations

related to history · 21

Protactinium → Crookes, Dmitri Mendeleev, Frederick Soddy, Germany, Great Britain, Greek, IV, John Cranston, Kasimir Fajans, Latin, Lise Meitner, Meitner, Mendeleev, Oswald Helmuth Göhring, Otto Hahn, Tantalum's, The IUPAC, UX, VI, William Crookes

related to Organometallic compounds · 8

Protactinium → Another, C5H5, C8H8, IV, K2C8H8, One, Pa, Similar

related to Oxides and oxygen-containing salts · 8

Protactinium → A3PaO4, A7PaO6, Another, APaO3, Pa2O5, PaO, PaO2, R2O3

related to Occurrence · 7

Protactinium → Congo, Czech Republic, Democratic Republic, Jáchymov, Much, Nearly, Whereas

related to Other inorganic compounds · 6

Protactinium → BH4, Oxyhalides, Pa, PaC, PaOBr3, PaOS

related to Halides · 4

Protactinium → Brown-colored, III, IV, UF5

related to In nuclear reactors · 4

Protactinium → Extraction, Protactinium-233, Thus, Two

related to Precautions · 4

Protactinium → Bq/m3, GBq, Germany, Pa

is a · 2

Protactinium → chemical element, metal with silvery-gray luster that is preserved for some time in air

has application · 2

Protactinium → Although, Walter Seifritz

Important terminology

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

Important terminology

231pa decay uranium isotope element thorium nuclear half-life also produced structure metal isotopes water years chemical pa 233pa chloride chain

Protactinium relationships Subject–Predicate–Object triples

TTTA extracted 110 structured relationships around Protactinium. Examples in this analysis include Protactinium → 229Pa → synth and Protactinium → 231Pa → 100%. The table shows each extracted connection, where it came from and its confidence.

Subject	Predicate	Object	Confidence	Src
Protactinium	229Pa	synth	1.00	infobox
Protactinium	230Pa	synth	1.00	infobox
Protactinium	231Pa	100%	1.00	infobox
Protactinium	232Pa	synth	1.00	infobox
Protactinium	233Pa	trace	1.00	infobox
Protactinium	234mPa	trace	1.00	infobox
Protactinium	234Pa	trace	1.00	infobox
Protactinium	Appearance	bright, silvery metallic luster	1.00	infobox
Protactinium	Atomic number (Z)	91	1.00	infobox
Protactinium	Atomic radius	empirical: 163 pm	1.00	infobox
Protactinium	Block	f-block	1.00	infobox
Protactinium	Boiling point	4300 K (4027 °C, 7280 °F) (?)	1.00	infobox
Protactinium	CAS Number	7440-13-3	1.00	infobox
Protactinium	Covalent radius	200 pm	1.00	infobox
Protactinium	Crystal structure	body-centered tetragonal (tI2)	1.00	infobox
Protactinium	Density (at 20° C)	15.43 g/cm3	1.00	infobox
Protactinium	Discovery	Kasimir Fajans and Oswald Helmuth Göhring (1913)	1.00	infobox
Protactinium	Electrical resistivity	177 nΩ⋅m (at 0 °C)	1.00	infobox
Protactinium	Electron configuration	[Rn] 5f2 6d1 7s2	1.00	infobox
Protactinium	Electronegativity	Pauling scale: 1.5	1.00	infobox
Protactinium	Electrons per shell	2, 8, 18, 32, 20, 9, 2	1.00	infobox
Protactinium	First isolation	Aristid von Grosse (1934)	1.00	infobox
Protactinium	Group	f-block groups (no number)	1.00	infobox
Protactinium	Heat of fusion	12.34 kJ/mol	1.00	infobox
Protactinium	Heat of vaporization	481 kJ/mol	1.00	infobox
Protactinium	Ionization energies	1st: 568 kJ/mol	1.00	infobox
Protactinium	Lattice constant	a = 392.1 pm c = 323.5 pm (at 20 °C)	1.00	infobox
Protactinium	Magnetic ordering	paramagnetic	1.00	infobox
Protactinium	Melting point	1841 K (1568 °C, 2854 °F)	1.00	infobox
Protactinium	Named by	Otto Hahn and Lise Meitner (1917–8)	1.00	infobox

Related concept clusters Related term clusters

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

Protactinium
- Uranium
- Produced
- Thorium
- Chloride
- Hydrogen
- Ions
- Reacting
- Temperature
- Nuclear
- Decay
- 231pa
- Obtained
protactinium
- Uranium
- Produced
- Thorium
- Chloride
- Hydrogen
- Ions
- Reacting
- Temperature
- Nuclear
- Decay
- 231pa
- Obtained
chemical element
- Element
- Oxidation
- States
- Uranium
- Structure
- Oxygen
- Half-life
- Pa
- Radioactive
- 234mpa
- Decay
- Isotope
oxygen
- Hydrogen
- Water
- Structure
- Radioactive
- 234mpa
- Oxidation
- States
- Form
- Obtained
- Reacting
- Reactors
- 233pa
chemical compounds
- Element
- Oxidation
- States
- Structure
- Oxygen
- Pa
- Also
- Uranium
- Radioactive
- 234mpa
- Various
- Form
spent nuclear fuel
- Reactors
- 234mpa
- Decay
- 233pa
- Half-life
- Isotope
- Chain
- Isotopes
- 231pa
- Produced
- Thorium
- Uranium
mononuclidic element
- Uranium
- Half-life
- Radioactive
- 234mpa
- Decay
- Isotope
- Isotopes
- Pa
- Also
- Protactinium
- Thorium
- 231pa
nuclear isomer
- Reactors
- 234mpa
- Decay
- 233pa
- Half-life
- Isotope
- Chain
- Isotopes
- 231pa
- Produced
- Thorium
- Uranium

Connections between topic areas Semantic bridges

For Protactinium, one of the stronger structural bridges in this analysis connects Protactinium 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.

Min side: 3

Protactinium — Chemical compounds · splits 132 ⟂ 38

Protactinium — Overview · splits 133 ⟂ 37

Protactinium — History · splits 141 ⟂ 29

Protactinium — Occurrence · splits 152 ⟂ 18

Protactinium — Isotopes · splits 158 ⟂ 12

Protactinium — Properties · splits 160 ⟂ 10

Protactinium — Applications · splits 160 ⟂ 10

Protactinium — Precautions · splits 164 ⟂ 6

Protactinium — Preparation · splits 165 ⟂ 5

Protactinium — Bibliography · splits 166 ⟂ 4

Map overview Semantic statistics

Protactinium

Nodes170

Edges169

Triples110

Avg. degree1.99

Density0.011765

Components1

Source & methodology

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

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

Protactinium: History & Applications

Protactinium 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

Isotopes

Occurrence

Preparation

Properties

Chemical compounds

Applications

Precautions

Bibliography

For the semantics nerds

Advanced semantic analysis

How Protactinium connects Entity context

Protactinium

Top relations

Important terminology

Important terminology

Protactinium relationships Subject–Predicate–Object triples

Related concept clusters Related term clusters

Connections between topic areas Semantic bridges

Map overview Semantic statistics

Protactinium

Source & methodology