Europium, 63 File:Europium.jpg उच्चारण (yuu-ROH -pee-əm दिखावट silvery white, with a pale yellow tint;[1] Standard atomic weight A r °(Eu) ± 0.001± 0.01[2]
Atomic number (Z ) 63 समूह group n/a अवधि period 6 ब्लॉक f-block ऋणावेशित सूक्ष्म अणु का विन्यास [Xe ] 4f7 6s2 प्रति शेल इलेक्ट्रॉन 2, 8, 18, 25, 8, 2 Phase at STP solid गलनांक 1099 K (826 °C, 1519 °F) क्वथनांक 1802 K (1529 °C, 2784 °F) Density (near r.t. ) 5.244 g/cm3 when liquid (at m.p. ) 5.13 g/cm3 संलयन की गर्मी 9.21 kJ/mol Heat of vaporization 176 kJ/mol दाढ़ गर्मी क्षमता 27.66 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
863
957
1072
1234
1452
1796
ऑक्सीकरण राज्य 0,[3] +2 +3 basic oxide) इलेक्ट्रोनगेटिविटी Pauling scale: 1.2 Ionization energies 1st: 547.1 kJ/mol 2nd: 1085 kJ/mol 3rd: 2404 kJ/mol परमाणु का आधा घेरा empirical: 180 pm सहसंयोजक त्रिज्या 198±6 pm Spectral lines of europiumप्राकृतिक घटना primordial क्रिस्टल की संरचना body-centered cubic (bcc) थर्मल विस्तार poly: 35.0 µm/(m⋅K) (at r.t. ) ऊष्मीय चालकता est. 13.9 W/(m⋅K) विद्युत प्रतिरोधकता poly: 0.900 µΩ⋅m (at r.t. ) चुंबकीय आदेश paramagnetic [4] दाढ़ चुंबकीय संवेदनशीलता 000 .0× 10−6 3 /mol[5] यंग मापांक 18.2 GPa कतरनी मापांक 7.9 GPa थोक मापांक 8.3 GPa पॉइसन अनुपात 0.152 विकर्स कठोरता 165–200 MPa CAS नंबर 7440-53-1 नामी after Europe खोज और पहला अलगावEugène-Anatole Demarçay (1896, 1901)
Category Category: Europium references
Eu: Script error: The module returned a nil value. It is supposed to return an export table.
in
calc from C
diff
report
ref
C
826
—
—
K
1099
1099
0
F
1519
1519
0
max precision
0
WD
Script error: The module returned a nil value. It is supposed to return an export table.
Script error: The module returned a nil value. It is supposed to return an export table.
input
C: 826, K: 1099, F: 1519
comment
Eu: Script error: The module returned a nil value. It is supposed to return an export table.
in
calc from C
diff
report
ref
C
1529
—
—
K
1802
1802
0
F
2784
2784
0
max precision
0
WD
Script error: The module returned a nil value. It is supposed to return an export table.
Script error: The module returned a nil value. It is supposed to return an export table.
input
C: 1529, K: 1802, F: 2784
comment
References These references will appear in the article, but this list appears only on this page.
↑ Greenwood, Norman N. ; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann . p. 112. ISBN 978-0-08-037941-8 ↑ "Standard Atomic Weights: Europium" . CIAAW . 1995.↑ Yttrium and all lanthanides except Ce and Pm have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev . 22 : 17–24. doi :10.1039/CS9932200017 . Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke (2003-12-15). "Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation". Journal of Organometallic Chemistry . 688 (1–2): 49–55. doi :10.1016/j.jorganchem.2003.08.028 .
↑ Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5 ↑ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics . Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4 Lua error in Module:TNT at line 182: Missing Commons dataset I18n/Module:TNT.tab.
