Caesium, 55Cs| File:Cesium.jpg |
|
| उच्चारण | (SEE-zee-əm) |
|---|
| Alternative name | cesium (US) |
|---|
| दिखावट | pale gold |
|---|
| Standard atomic weight Ar°(Cs) | - 132.90545196±0.00000006
- 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 caesium |
|
| प्राकृतिक 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.
Lua error in Module:TNT at line 182: Missing Commons dataset I18n/Module:TNT.tab.