Ang rubidyo (Iningles rubidium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Rb ug kaiphan nga atomik 37. Ang rubidyo mao ang puthaw.
Quick Facts Rubidium, Panagway ...
| Rubidium |
|---|
37Rb |
|
|
| Panagway |
grey white
 |
| Kinatibuk-ang mga kinaiya |
| Ngalan, simbolo, kaiphan |
rubidium, Rb, 37 |
| Paglitok |
[[Help:Pronunciation respelling key|roo-Plantilya:Smallcaps all-ee-əm]] |
| Kategoriyang elemento |
puthaw |
| Group, period, block |
1, 5, s |
| Gibug-aton sa atomo |
85.4678(3) |
| Kontorno sa elektron |
[Kr] 5s1
2, 8, 18, 8, 1
 Electron shells of rubidium (2, 8, 18, 8, 1) |
| History |
| Pagkadiskobre |
Robert Bunsen and Gustav Kirchhoff (1861) |
| First isolation |
George de Hevesy |
| Physical properties |
| Phase |
magahi |
| Density (near r.t.) |
1.532 g·cm−3 |
| Liquid density at m.p. |
1.46 g·cm−3 |
| Melting point |
312.46 K, 39.31 °C, 102.76 °F |
| Boiling point |
961 K, 688 °C, 1270 °F |
| Critical point |
(extrapolated) 2093 K, 16 MPa |
| Heat of fusion |
2.19 kJ·mol−1 |
| Heat of vaporization |
75.77 kJ·mol−1 |
| Molar heat capacity |
31.060 J·mol−1·K−1 |
| Vapor pressure |
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
434 |
486 |
552 |
641 |
769 |
958 |
|
| Atomic properties |
| Oxidation states |
1
(strongly basic oxide) |
| Electronegativity |
0.82 (Pauling scale) |
| Ionization energies |
1st: 403 kJ·mol−1 |
| 2nd: 2632.1 kJ·mol−1 |
| 3rd: 3859.4 kJ·mol−1 |
| Atomic radius |
248 pm |
| Covalent radius |
220±9 pm |
| Van der Waals radius |
303 pm |
| Miscellanea |
| Crystal structure |
body-centered cubic
|
| Magnetic ordering |
paramagnetic[1] |
| Electrical resistivity |
(20 °C) 128 nΩ·m |
| Thermal conductivity |
58.2 W·m−1·K−1 |
| Speed of sound (thin rod) |
(20 °C) 1300 m·s−1 |
| Young's modulus |
2.4 GPa |
| Bulk modulus |
2.5 GPa |
| Mohs hardness |
0.3 |
| Brinell hardness |
0.216 MPa |
| CAS registry number |
7440-17-7 |
| Most stable isotopes |
| Main article: Isotopes of rubidium |
| iso |
NA |
half-life |
DM |
DE (MeV) |
DP
Plantilya:Infobox element/isotopes decay2 |
|---|
| 84Rb |
syn |
32.9 d |
ε |
84Kr |
| β+ |
84Kr |
| γ |
- |
| β− |
84Sr
Plantilya:Infobox element/isotopes stable
Plantilya:Infobox element/isotopes decay2
Plantilya:Infobox element/isotopes decay |
|
| · r |
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