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Ajnštajnijum - Wikipedia

Ajnštajnijum

From Wikipedia

Cf - Es - Fm
Ho
Es
 

Važniji podaci
Ime, simbol,atomski broj Ajnštajnijum, Es, 99
Pripadnost skupu aktinoida
grupa, perioda  , 7
atomska masa 252 u
elektronska konfiguracija [Rn]5f117s2
e- na energetskim nivoima 2, 8, 18, 32, 29, 8, 2
oksidacioni brojevi 2, 3
agregatno stanje bez podataka
Elektronegativnost 1,3 (Pauling)
Najstabilniji izotopi
izotop zast. v.p.r. n.r. e.r. MeV p.r.
252Es (veš.) 471,7 dana z.e. 1,260 252Cf
β- 0,480 252Fm
α 6,760 248Bk
253Es (veš.) 20,47 dana α 6,739 249Bk
254Es (veš.) 275,7 dana z.e. 0,654 254Cf
β- 1,090 254Fm
α 6,628 250Bk
255Es (veš.)</] 39,8 dana β- 0,288 255Fm
α 6,436 251Bk
Tamo gde drugačije nije naznačeno,
upotrebljene su SI jedinice i normalni uslovi.
Objašnjenja skraćenica:

zast.=zastupljenost u prirodi,
v.p.r.=vreme polu raspada,
n.r.=način raspada,
e.r.=energija raspada,
p.r.=proizvod raspada,
z.e=zarobljavanje elektrona

Ajnštajnijum (Es, latinski - einsteinium) - je aktinoid. Ime je dobio po fizičaru Albertu Ajnštajnu.

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