File:Actinium_sample_(31481701837).png · Wikimedia Commons · See Wikimedia Commons

EntityQ1121· pop 143· linked from 710 articles

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Also known as element 89, emanium, 89Ac

یکی از عنصرهای جدول تناوبی عنصرها

OverviewAI-generated

Actinium is a chemical element with the symbol Ac and atomic number 89. Its standard chemical formula is Ac. The element has an atomic mass of 227.028 and a PubChem weight of 227.02775. It exhibits an oxidation state of 3 and an electronegativity of 1.1. The ionization energy is 1170, and the ionic radius is 112.

Actinium was discovered in 1899. In Unicode, it is represented by the character "錒". Its canonical SMILES notation is "[Ac]". The PubChem identifier for the substance is 23965, and its IUPAC name is actinium. It has a topological polar surface area of 0, with zero hydrogen bond donors and acceptors, and a charge of 0. The InChIKey is QQINRWTZWGJFDB-UHFFFAOYSA-N.

References to actinium appear in 1341 PubMed records. It is referenced by 710 other encyclopedia articles.

Synthesized by Vinony from 25 facts across 4 sources: Wikidata, PubChem, PubMed, Vinony graph. Generated from structured data (not the Wikipedia text) and checked against those facts — may still contain errors.

Chemical data

Formula: Ac
Molecular weight: 227.02775 g/mol
IUPAC name: actinium
SMILES: [Ac]
InChIKey: QQINRWTZWGJFDB-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

1,341 papers

Actinium-225 targeted alpha particle therapy for prostate cancer.ReviewTheranostics · 2024Bidkar AP, Zerefa L, Yadav S et al.DOI: 10.7150/thno.96403
Actinium-225 in Targeted Alpha Therapy.ReviewJournal of medical physics · 2024Rahman AKMR, Babu MH, Ovi MK et al.DOI: 10.4103/jmp.jmp_22_24
Actinium-225 Targeted Agents: Where Are We Now?ReviewBrachytherapy · 2023Mourtada F, Tomiyoshi K, Sims-Mourtada J et al.DOI: 10.1016/j.brachy.2023.06.228
Actinium-225-PSMA radioligand therapy of metastatic castration-resistant prostate cancer (WARMTH Act): a multicentre, retrospective study.The Lancet. Oncology · 2024Sathekge MM, Lawal IO, Bal C et al.DOI: 10.1016/S1470-2045(23)00638-1
Astatine-211 and actinium-225: two promising nuclides in targeted alpha therapy.ReviewActa biochimica et biophysica Sinica · 2024Zuo D, Wang H, Yu B et al.DOI: 10.3724/abbs.2024206
Time for action: actinium-225 PSMA-targeted alpha therapy for metastatic prostate cancer - a systematic review and meta-analysis.Theranostics · 2025Ninatti G, Scilipoti P, Pini C et al.DOI: 10.7150/thno.106574
Preclinical Efficacy of a PSMA-Targeted Actinium-225 Conjugate (225Ac-Macropa-Pelgifatamab): A Targeted Alpha Therapy for Prostate Cancer.Clinical cancer research : an official journal of the American Association for Cancer Research · 2024Schatz CA, Zitzmann-Kolbe S, Moen I et al.DOI: 10.1158/1078-0432.CCR-23-3746
Challenges and opportunities in developing Actinium-225 radiopharmaceuticals.ReviewNuclear medicine communications · 2022Dhiman D, Vatsa R, Sood ADOI: 10.1097/MNM.0000000000001594

Wikidata facts

Instance of: radioactive element
Part of: period 7
Named after: light beam
Mass: 227.028
Image: Actinium sample (31481701837).png

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element symbol: Ac
Commons category: Actinium
discoverer or inventor: André-Louis Debierne
topic's main category: Category:Actinium
atomic number: 89
Commons gallery: Actinium
has characteristic: radioactivity
time of discovery or invention: 1899-00-00
Unicode character: 錒
oxidation state: 3
electronegativity: 1.1
ionization energy: 1170
canonical SMILES: [Ac]
chemical formula: Ac
ionic radius: 112
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4

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