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Properties of substance:

lawrencium

Group of substances:

inorganic

Empirical formula (Hill's system for organic substances):

Lr

Structural formula as text:

Lr

Molar/atomic mass: 262

Melting point (°C):

1627

Numerical data:

Year of discovery: 1961

Half-life:

252103Lr = 390 ms ()
253103Lr = 580 ms (α (90%), spontaneous fission (2.6%))
254103Lr = 13 s (α (76%), β+ (24%))
255103Lr = 22 s ()
256103Lr = 27 s (α (85%), β+ (15%))
257103Lr = 646 ms (α (about 100%))
258103Lr = 4.1 s ()
259103Lr = 6.2 s (α (78%), spontaneous fission (22%))
260103Lr = 3 min (α (80%), β+ (20%))
261103Lr = 39 min ()
262103Lr = 4 h ()
263103Lr = 5 h (about) ()
264103Lr = 10 h (about) ()
265103Lr = 10 h (about) ()

Electrode potential:

Lr3+ + 3e- → Lr, E = -2.1 V (water, 25°C)

References:

  1. Handbook of Chemistry and Physics. - CRC Press, Inc., 2002. - pp. 1-13
  2. Nuclear Physics A. - 2003. - vol.729, Issue 1, 1 December. - pp. 121-125
  3. Гринвуд Н., Эрншо А. Химия элементов. - Т.2. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 581 [Russian]
  4. Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 611 [Russian]
  5. Химия актиноидов. - Т.2. - М.: Мир, 1997. - pp. 637-641 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru