Caesium, 55 Cs File:Cesium.jpg उच्चारण (SEE -zee-əm ) Alternative name cesium (US) दिखावट pale gold Standard atomic weight A r °(Cs) 132.905451 96 ± 0.000000 06 132.91± 0.01 (abridged)[1]
Atomic number (Z ) 55 समूह group 1: hydrogen and alkali metals अवधि period 6 ब्लॉक s-block ऋणावेशित सूक्ष्म अणु का विन्यास [Xe ] 6s1 प्रति शेल इलेक्ट्रॉन 2, 8, 18, 18, 8, 1 Phase at STP solid गलनांक 301.7 K (28.5 °C, 83.3 °F) क्वथनांक 944 K (671 °C, 1240 °F) Density (near r.t. ) 1.93 g/cm3 when liquid (at m.p. ) 1.843 g/cm3 क्रिटिकल पॉइंट 1938 K, 9.4 MPa[2] संलयन की गर्मी 2.09 kJ/mol Heat of vaporization 63.9 kJ/mol दाढ़ गर्मी क्षमता 32.210 J/(mol·K) Vapor pressure
P (Pa)
1
10
100
1 k
10 k
100 k
at T (K)
418
469
534
623
750
940
ऑक्सीकरण राज्य −1, +1 [3] (a strongly basic oxide) इलेक्ट्रोनगेटिविटी Pauling scale: 0.79 Ionization energies 1st: 375.7 kJ/mol 2nd: 2234.3 kJ/mol 3rd: 3400 kJ/mol परमाणु का आधा घेरा empirical: 265 pm सहसंयोजक त्रिज्या 244±11 pm [वैन डेर वाल्स रेडियस]] 343 pm Spectral lines of caesiumप्राकृतिक घटना primordial क्रिस्टल की संरचना body-centered cubic (bcc) थर्मल विस्तार 97 µm/(m⋅K) (at 25 °C) ऊष्मीय चालकता 35.9 W/(m⋅K) विद्युत प्रतिरोधकता 205 nΩ⋅m (at 20 °C) चुंबकीय आदेश paramagnetic [4] यंग मापांक 1.7 GPa थोक मापांक 1.6 GPa मोहन कठोरता 0.2 ब्रिनेल हार्डनेस 0.14 MPa CAS नंबर 7440-46-2 नामी from Latin caesius , sky blue, for its spectral colours खोज ]Robert Bunsen and Gustav Kirchhoff (1860) पहला अलगाव Carl Setterberg (1882)
Category Category: Caesium | references
Cs: Script error: The module returned a nil value. It is supposed to return an export table.
in
calc from C
diff
report
ref
C
28.5
—
—
K
301.7
301.6
0.1
delta
F
83.3
83.3
0
max precision
1
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: 28.5, K: 301.7, F: 83.3
comment
Cs: Script error: The module returned a nil value. It is supposed to return an export table.
in
calc from C
diff
report
ref
C
671
—
—
K
944
944
0
F
1240
1240
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: 671, K: 944, F: 1240
comment
References
These references will appear in the article, but this list appears only on this page.
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