Periodic Table/Lawrencium
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103Lr262 Da

Lawrencium

Transition Metal·Period 7·f-block

Appearance unknown, however it is most likely silvery-white or grey and metallic. Lawrencium is a synthetic rare-earth metal. There are eight known radioisotopes, the most stable being Lr-262 with a half-life of 3.6 hours. Due to the short half-life of lawrencium, and its radioactivity, there are no known uses for it. Identified by Albert Ghiorso in 1961 at Berkeley. It was produced by bombarding californium with boron ions. The name is temporary IUPAC nomenclature, the origin of the name comes from Ernest O. Lawrence, the inventor of the cyclotron. If sufficient amounts of lawrencium were produced, it would pose a radiation hazard.

Gallery

This is only an illustration, not lawrencium itself. Lawrencium can only be made in very small amounts and emits strong radiation

Chemical Elements A Virtual Museum under a Creative Commons Attribution 3.0 Unported License, source: https://images-of-elements.com/lawrencium.php

Bohr model of Lawrencium

Physical Propertiesmass · density · phase · crystal

Atomic Mass

262Da

Density

15.6000g/cm³

Phase (STP)

Solid

Melting Point

1900.2K

Boiling Point

—

Molar Heat

—

Crystal Structure

—

Atomic Radiiatomic · covalent · van der Waals

Atomic (Empirical)

—

Covalent

161.00pm

Van der Waals

246.00pm

Electronic Propertieselectronegativity · ionization · affinity

Electron Configuration

[Rn] 5f14 7s2 7p1

Electron Shells

2, 8, 18, 32, 32, 8, 3

Electronegativity

—

Electron Affinity

—

1st Ionization Energy

5.0kJ/mol

Oxidation States

+3

Orbital DiagramAufbau · Hund's rule · Pauli exclusion

↑↓
1s2
↑↓
2s2
↑↓
↑↓
↑↓
2p6
↑↓
3s2
↑↓
↑↓
↑↓
3p6
↑↓
↑↓
↑↓
↑↓
↑↓
3d10
↑↓
4s2
↑↓
↑↓
↑↓
4p6
↑↓
↑↓
↑↓
↑↓
↑↓
4d10
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
4f14
↑↓
5s2
↑↓
↑↓
↑↓
5p6
↑↓
↑↓
↑↓
↑↓
↑↓
5d10
↑↓
6s2
↑↓
↑↓
↑↓
6p6
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
5f14
↑↓
7s2
↑
7p1

Full: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 6s2 6p6 5f14 7s2 7p1Short: [Rn] 5f14 7s2 7p1

Ionization Energies (103 known)

1st5.0 kJ/mol2nd14.5 kJ/mol3rd21.8 kJ/mol4th43.6 kJ/mol5th56.0 kJ/mol6th80.0 kJ/mol7th96.0 kJ/mol8th121.0 kJ/mol9th143.0 kJ/mol10th165.0 kJ/mol11th197.0 kJ/mol12th216.0 kJ/mol13th244.0 kJ/mol14th269.0 kJ/mol15th290.0 kJ/mol16th322.0 kJ/mol17th344.0 kJ/mol18th374.0 kJ/mol19th403.0 kJ/mol20th431.0 kJ/mol21th459.0 kJ/mol22th487.0 kJ/mol23th510.0 kJ/mol24th540.0 kJ/mol25th560.0 kJ/mol26th745.0 kJ/mol27th779.0 kJ/mol28th814.0 kJ/mol29th852.0 kJ/mol30th888.0 kJ/mol31th922.0 kJ/mol32th985.0 kJ/mol33th1020.0 kJ/mol34th1061.0 kJ/mol35th1098.0 kJ/mol36th1280.0 kJ/mol37th1320.0 kJ/mol38th1360.0 kJ/mol39th1410.0 kJ/mol40th1570.0 kJ/mol41th1620.0 kJ/mol42th1760.0 kJ/mol43th1810.0 kJ/mol44th2010.0 kJ/mol45th2100.0 kJ/mol46th2190.0 kJ/mol47th2290.0 kJ/mol48th2380.0 kJ/mol49th2470.0 kJ/mol50th2570.0 kJ/mol51th2670.0 kJ/mol52th2780.0 kJ/mol53th2860.0 kJ/mol54th2960.0 kJ/mol55th3060.0 kJ/mol56th3150.0 kJ/mol57th3250.0 kJ/mol58th3741.0 kJ/mol59th3821.0 kJ/mol60th3906.0 kJ/mol61th3996.0 kJ/mol62th4082.0 kJ/mol63th4165.0 kJ/mol64th4360.0 kJ/mol65th4448.0 kJ/mol66th4540.0 kJ/mol67th4630.0 kJ/mol68th4990.0 kJ/mol69th5070.0 kJ/mol70th5160.0 kJ/mol71th5250.0 kJ/mol72th5920.0 kJ/mol73th6030.0 kJ/mol74th6290.0 kJ/mol75th6390.0 kJ/mol76th9920.0 kJ/mol77th10110.0 kJ/mol78th10310.0 kJ/mol79th10520.0 kJ/mol80th10720.0 kJ/mol81th10920.0 kJ/mol82th11470.0 kJ/mol83th11680.0 kJ/mol84th11910.0 kJ/mol85th12120.0 kJ/mol86th12710.0 kJ/mol87th12890.0 kJ/mol88th13090.0 kJ/mol89th13300.0 kJ/mol90th15300.0 kJ/mol91th15600.0 kJ/mol92th16000.0 kJ/mol93th16200.0 kJ/mol94th32400.0 kJ/mol95th32900.0 kJ/mol96th33400.0 kJ/mol97th33900.0 kJ/mol98th41600.0 kJ/mol99th42300.0 kJ/mol100th43200.0 kJ/mol101th43759.0 kJ/mol102th170116.0 kJ/mol103th172928.0 kJ/molSuccessive Ionization Energies

Abundanceby mass

Biological Role

No biological role

Synthetic, radioactive element. No biological role.

Discovery

Discovered By

A.Ghiorso, T.Sikkeland, A.E.Larsh, R.M.Latimer

Named By

—

Year

1961

Nuclear Data

Known Isotopes

16

Stable Isotopes

0

Stable Mass Numbers

None

Isotopes of Lr16 known

NuclideZNMass (AMU)Half-lifeDecayJπAbundance
251Lr103148251.094289Unknownβ⁺, α——
252Lr103149252.095048369 msα (0.98%), SF (0.02%), β⁺7-—
253Lr103150253.095034632 msα (0.9%), SF (0.01%), β⁺7/2-—
264Lr103161264.114198Unknownα, SF——
265Lr103162265.116193Unknownα, SF1/2-—
266Lr103163266.11987422.0 hSF (1%)——

Click any isotope for its full page with decay chain:

251Lr252Lr253Lr254Lr255Lr256Lr257Lr258Lr259Lr260Lr261Lr262Lr263Lr264Lr265Lr266Lr
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