Actinium

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:

Actinium topic overview

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

Related topics: 139
Source areas: 8
Connected nodes: 149
Extracted relationships: 134
Concept neighborhoods: 45
Bridge connections: 149

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 · 29 topics

Occurrence and synthesis · 27 topics

Overview · 26 topics

Applications · 22 topics

History · 13 topics

Isotopes · 10 topics

Properties · 10 topics

Precautions · 2 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.

225Ac: trace
226Ac: synth
227Ac: trace
228Ac: trace
Appearance: silvery-white, glowing with an eerie blue light; sometimes with a golden cast
Atomic number (Z): 89

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

Chemical element
Symbol Chemical symbol
Atomic number
Friedrich Oskar Giesel
André-Louis Debierne
Actinides Actinide
Lawrencium
Periodic table
Polonium
226Ra Radium
Radon
Non-primordial radioactive elements Primordial element
Radioactive
Oxygen
Lanthanides Lanthanide
Oxidation state
Uranium
Thorium
Isotope
Half-life
Beta Beta particle
Alpha particles Alpha particle
Tonne
Lanthanum
Nuclear reactor
Radiation therapy

History

Bibliography

ISBN ISBN (identifier)

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How Actinium connects Entity context

The extracted context around Actinium shows recurring relationship patterns in the source. For example, Actinium → Actinide, Dordrecht, Edelstein, Fuger, ISBN, Jean, Kirby, Morss, NLM Hazardous Substances Databank, Norman, Nottingham, RadioactiveActinium, Springer, The Chemistry, The Netherlands, The Periodic Table, Transactinide Elements, University, Videos Another extracted example is Actinium → Ac, Ac2O3, Ac2S3, AcBr3, AcCl3, AcF3, AcOBr, AcOCl, AcOF, AcPO4, Density, Due, Here, In, No, NO3, These, They. Use these groups to spot repeated connection types before inspecting the individual relationships.

Top relations

related to External links · 19

Actinium → Actinide, Dordrecht, Edelstein, Fuger, ISBN, Jean, Kirby, Morss, NLM Hazardous Substances Databank, Norman, Nottingham, RadioactiveActinium, Springer, The Chemistry, The Netherlands, The Periodic Table, Transactinide Elements, University, Videos

related to Chemical compounds · 18

Actinium → Ac, Ac2O3, Ac2S3, AcBr3, AcCl3, AcF3, AcOBr, AcOCl, AcOF, AcPO4, Density, Due, Here, In, No, NO3, These, They

related to history · 18

Actinium → Adloff, After, André-Louis Debierne, Articles, Debierne, Debierne's, French, Friedrich Oskar Giesel, Furthermore, Giesel, Harriet Brooks, He, In, Marie, Otto Hahn, Otto Sackur, Pierre Curie, This

related to Properties · 9

Actinium → British, Dmitri Mendeleev's, Glenn, Henry Bassett, Its, Owing, Seaborg's, Solvent, The

related to Isotopes · 8

Actinium → All, Da, It, Naturally, Owing, Purified, The, Thirty-three

related to Halides · 7

Actinium → AcOF, However, In, Similarly, The, Treating, Whereas

related to Other compounds · 7

Actinium → Ac2S3, AcPO4, It, LaH2, Mixing, NaH2PO4, The

Ionization energies · 4

Actinium → (more), 1st: 499 kJ/mol, 2nd: 1170 kJ/mol, 3rd: 1900 kJ/mol

related to Occurrence and synthesis · 4

Actinium → Another, Instead, La2O3, The

related to Precautions · 3

Actinium → For, Its, When

Important terminology

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

Important terminology

227ac 225ac element decay isotope radioactive thorium isotopes half-life lanthanum chemical alpha radium first oxidation radiation neutron uranium lanthanides 228ac

Actinium relationships Subject–Predicate–Object triples

TTTA extracted 134 structured relationships around Actinium. Examples in this analysis include Actinium → 225Ac → trace and Actinium → 226Ac → synth. The table shows each extracted connection, where it came from and its confidence.

Subject	Predicate	Object	Confidence	Src
Actinium	225Ac	trace	1.00	infobox
Actinium	226Ac	synth	1.00	infobox
Actinium	227Ac	trace	1.00	infobox
Actinium	228Ac	trace	1.00	infobox
Actinium	Appearance	silvery-white, glowing with an eerie blue light; sometimes with a golden cast	1.00	infobox
Actinium	Atomic number (Z)	89	1.00	infobox
Actinium	Block	f-block	1.00	infobox
Actinium	Boiling point	3500±300 K (3200±300 °C, 5800±500 °F) (extrapolated)	1.00	infobox
Actinium	CAS Number	7440-34-8	1.00	infobox
Actinium	Covalent radius	215 pm	1.00	infobox
Actinium	Crystal structure	face-centered cubic (fcc) (cF4)	1.00	infobox
Actinium	Density (near r.t.)	10 g/cm3	1.00	infobox
Actinium	Discovery	Friedrich Oskar Giesel (1902)	1.00	infobox
Actinium	Electron configuration	[Rn] 6d1 7s2	1.00	infobox
Actinium	Electronegativity	Pauling scale: 1.1	1.00	infobox
Actinium	Electrons per shell	2, 8, 18, 32, 18, 9, 2	1.00	infobox
Actinium	First isolation	Joseph G. Stites, Murrell L. Salutsky, Bob D. Stone (1955)	1.00	infobox
Actinium	Group	f-block groups (no number)	1.00	infobox
Actinium	Heat of fusion	14 kJ/mol	1.00	infobox
Actinium	Heat of vaporization	400 kJ/mol	1.00	infobox
Actinium	Ionization energies	1st: 499 kJ/mol	1.00	infobox
Actinium	Ionization energies	2nd: 1170 kJ/mol	1.00	infobox
Actinium	Ionization energies	3rd: 1900 kJ/mol	1.00	infobox
Actinium	Ionization energies	(more)	1.00	infobox
Actinium	Lattice constant	a = 531.5 pm (at 20 °C)	1.00	infobox
Actinium	Main isotopes	.mw-parser-output .isotopes-table{text-align:center;width:100%;border-collapse:collapse;margin:0;padding:0}.mw-parser-output .isotopes-table-headers>:not(:first-child){padding:0…	1.00	infobox
Actinium	Melting point	1500 K (1227 °C, 2240 °F) (estimated)	1.00	infobox
Actinium	Molar heat capacity	27.2 J/(mol·K)	1.00	infobox
Actinium	Named by	André-Louis Debierne (1899)	1.00	infobox
Actinium	Naming	from the Ancient Greek ακτίς, "beam" or "ray"	1.00	infobox

Related concept clusters Concept neighborhoods

The concept neighborhoods around Actinium bring nearby vocabulary together. In this analysis, examples include Element, Oxidation and Chemical. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

Actinium
- Element
- Oxidation
- Chemical
- Lanthanum
- Decay
- Compounds
- Lanthanides
- Oxide
- Properties
- Series
- Acid
- Radium
actinium
- Element
- Oxidation
- Chemical
- Lanthanum
- Decay
- Compounds
- Lanthanides
- Oxide
- Properties
- Series
- Acid
- Radium
chemical element
- Properties
- Lanthanum
- Debierne
- Left
- Lanthanides
- Number
- Uranium
- Element
- First
- Compounds
- Oxidation
- Giesel
uranium
- Thorium
- Properties
- 228ac
- Chemical
- Lanthanum
- Applications
- Giesel
- Left
- Number
- Compounds
- Elements
- Lanthanides
actinium oxide
- Oxidation
- Element
- Chemical
- Lanthanum
- Decay
- Also
- Neutron
- Reaction
- Compounds
- Lanthanides
- Oxide
- Properties
actinium tribromide
- Element
- Oxidation
- Chemical
- Lanthanum
- Decay
- Compounds
- Lanthanides
- Oxide
- Properties
- Series
- Acid
- Radium
actinium trifluoride
- Element
- Oxidation
- Chemical
- Lanthanum
- Decay
- Compounds
- Lanthanides
- Oxide
- Properties
- Series
- Acid
- Radium
actinium hydride
- Element
- Oxidation
- Chemical
- Lanthanum
- Decay
- Compounds
- Lanthanides
- Oxide
- Properties
- Series
- Acid
- Radium

Connections between topic areas Semantic bridges

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

Actinium — Chemical compounds · splits 120 ⟂ 30

Actinium — Occurrence and synthesis · splits 122 ⟂ 28

Actinium — Overview · splits 123 ⟂ 27

Actinium — Applications · splits 127 ⟂ 23

Actinium — History · splits 136 ⟂ 14

Actinium — Properties · splits 139 ⟂ 11

Actinium — Isotopes · splits 139 ⟂ 11

Actinium — Precautions · splits 147 ⟂ 3

Map overview Semantic statistics

Actinium

Nodes150

Edges149

Triples134

Avg. degree1.99

Density0.013333

Components1

Source & methodology

TTTA analyzes the structure around Actinium 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 — Actinium · EN edition · Analysis: TopicsToTalkAbout