# Rubidyo

| Rubidium |
| --- |
| **37Rb** |
|

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| K ↑ **Rb** ↓ Cs |

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Periodic table |

 |  |
|  | krypton ← **rubidium** → strontium |

 |
| Panagway |
| grey white  |
| Kinatibuk-ang mga kinaiya |
| Ngalan, simbolo, kaiphan | rubidium, Rb, 37 |
| Paglitok | /rᵿˈbɪdiəm/ [[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 |
| 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 |

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| * v
* t
* e
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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.

## Ang mga gi basihan niini

## Galeriya sa hulagway

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