lawrencium

Also known as Lr, element 103, 103Lr

Lawrencium is a synthetic chemical element; it has symbol Lr (formerly Lw) and atomic number 103. It is named after Ernest Lawrence, inventor of the cyclotron, a device used to discover many artificial radioactive elements. A radioactive metal, lawrencium is the eleventh transuranium element, the third transfermium, and the last member of the actinide series. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Fourteen isotopes of lawrencium are known; the most stable is 266Lr with half-l

OverviewAI-generated

Lawrencium is a chemical element with the symbol Lr and atomic number 103. Its IUPAC name is lawrencium. The element has an electronegativity of 1.3. Its chemical formula is Lr, and its canonical SMILES representation is [Lr]. The Unicode character for the element is 鐒.

The element was discovered on February 14, 1961. Its molecular weight is 266.120. It has a topological polar surface area of 0. Lawrencium has zero hydrogen bond donors and zero hydrogen bond acceptors, with a charge of 0.

Information about lawrencium appears in 21 PubMed records. It is referenced by 1,114 other encyclopedia articles. The element is categorized under the Commons category "Lawrencium" and has a corresponding gallery.

Synthesized by Vinony from 21 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: Lr
Molecular weight: 266.12 g/mol
IUPAC name: lawrencium
SMILES: [Lr]
InChIKey: CNQCVBJFEGMYDW-UHFFFAOYSA-N
Polar surface area: 0 Å²
H-bond donors: 0
H-bond acceptors: 0
Formal charge: 0

via PubChem

Research

21 papers

Lawrencium's place at the table.Nature chemistry · 2016Nagame YDOI: 10.1038/nchem.2460
Measurement of the first ionization potential of lawrencium, element 103.Nature · 2015Sato TK, Asai M, Borschevsky A et al.DOI: 10.1038/nature14342
Nuclear chemistry: Lawrencium bridges a knowledge gap.Nature · 2015Türler ADOI: 10.1038/520166a
Is the chemistry of lawrencium peculiar?Physical chemistry chemical physics : PCCP · 2016Xu WH, Pyykkö PDOI: 10.1039/c6cp02706g
Recent great impact by an Isotope Separator On-Line (ISOL) in nuclear and radiochemistry.ReviewThe journal of medical investigation : JMI · 2016Sakama MDOI: 10.2152/jmi.63.19
Assessment of the Second-Ionization Potential of Lawrencium: Investigating the End of the Actinide Series with a One-Atom-at-a-Time Gas-Phase Ion Chemistry Technique.The journal of physical chemistry. A · 2021Kwarsick JT, Pore JL, Gates JM et al.DOI: 10.1021/acs.jpca.1c01961
Rare earth elements and yttrium as tracers of waste/rock-groundwater interactions.The Science of the total environment · 2022Cendón DI, Rowling B, Hughes CE et al.DOI: 10.1016/j.scitotenv.2022.154706
Multireference Wavefunction-Based Investigation of the Ground and Excited States of LrF and LrO.The journal of physical chemistry. A · 2023North SC, Almeida NMS, Melin TRL et al.DOI: 10.1021/acs.jpca.2c06968

via PubMed

~21 min read

Encyclopedic overview

13 sections

Contents

Introduction
History
Characteristics
Physical
Chemical
Atomic
Isotopes
Preparation and purification
See also
Notes
References
Bibliography
External links

Chemistry experiments confirm that lawrencium behaves as a heavier homolog to lutetium in the periodic table, and is trivalent. It could thus also be classified as the first of the 7th-period transition metals. Its electron configuration is anomalous for its position in the periodic table, having an s2p configuration instead of the s2d configuration of its homolog lutetium. However, this does not appear to affect lawrencium's chemistry.

Excerpted from Wikipedia’s “lawrencium” article, available under the CC BY-SA 4.0 licence.