Laurensyo

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Lawrencium
103Lr
Lu

Lr

(Upp)
nobeliumlawrenciumrutherfordium
Appearance
unknown
General properties
Name, simbolo, kaiphan lawrencium, Lr, 103
Pronunciation Plantilya:IPAc-en
Plantilya:Respell
Element category aktinido
sometimes considered a transition metal
Group, period, block n/a7, d
Standard atomic weight [262]
Electron configuration [Rn] 7s2 5f14 7p1
2, 8, 18, 32, 32, 8, 3
Electron shells of lawrencium (2, 8, 18, 32, 32, 8, 3)
History
Discovery Lawrence Berkeley National Laboratory (1961)
Physical properties
Phase magahi presumably
Atomic properties
Oxidation states 3
Ionization energies 1st: 443.8 kJ·mol−1
2nd: 1428.0 kJ·mol−1
3rd: 2219.1 kJ·mol−1
Miscellanea
CAS registry number 22537-19-5
Most stable isotopes
Main article: Isotopes of lawrencium
iso NA half-life DM DE (MeV) DP
262Lr syn 3.6 h EC 262No
261Lr syn 44 min SF/EC?
260Lr syn 2.7 min α 8.04 256Md
259Lr syn 6.2 s 78% α 8.44 255Md
22% SF
256Lr syn 27 s α 8.62,8.52,8.32... 252Md
255Lr syn 21.5 s α 8.43,8.37 251Md
254Lr syn 13 s 78% α 8.46,8.41 250Md
22% EC 254No
only isotopes with half-lives over 5 seconds are included here
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· r

Ang laurensyo (Iningles lawrencium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Lr ug kaiphan nga atomik 103. Ang laurensyo mao ang aktinido.

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