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
AI overview
Lawrencium is a synthetic radioactive metal created in particle accelerators by bombarding lighter elements with charged particles, named after the inventor of the cyclotron. It is notable as the last member of the actinide series and one of the heaviest human-made elements, though it has limited practical applications due to its extreme radioactivity and the difficulty of producing it.
AI-generated from the Wikipedia summary — may 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 Ų
- 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 Y
~21 min read
Article
13 sectionsContents
- Introduction
- History
- Characteristics
- Physical
- Chemical
- Atomic
- Isotopes
- Preparation and purification
- See also
- Notes
- References
- Bibliography
- External links
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-life 11 hours, but the shorter-lived 260Lr (half-life 2.7 minutes) is most commonly used in chemistry because it can be produced on a larger scale.
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.