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Rubidium
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37Rb
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Panagway
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grey white
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Kinatibuk-ang mga kinaiya
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Ngalan,simbolo,kaiphan
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rubidium, Rb, 37
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Paglitok
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[[Help:Pronunciation respelling key|roo-Plantilya:Smallcaps all-ee-əm]]
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Kategoriyang elemento
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puthaw
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Group,period,block
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1,5,s
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Gibug-aton sa atomo
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85.4678(3)
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Kontorno sa elektron
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[Kr] 5s1 2, 8, 18, 8, 1
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History
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Pagkadiskobre
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Robert BunsenandGustav Kirchhoff(1861)
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First isolation
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George de Hevesy
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Physical properties
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Phase
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magahi
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Density(nearr.t.)
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1.532 g·cm−3
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Liquiddensityatm.p.
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1.46 g·cm−3
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Melting point
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312.46K, 39.31 °C, 102.76 °F
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Boiling point
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961 K, 688 °C, 1270 °F
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Critical point
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(extrapolated) 2093 K, 16 MPa
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Heat of fusion
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2.19kJ·mol−1
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Heat of vaporization
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75.77 kJ·mol−1
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Molar heat capacity
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31.060 J·mol−1·K−1
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Vapor pressure
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P (Pa)
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1
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10
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100
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1 k
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10 k
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100 k
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at T (K)
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434
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486
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552
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641
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769
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958
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Atomic properties
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Oxidation states
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1 (stronglybasicoxide)
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Electronegativity
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0.82 (Pauling scale)
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Ionization energies
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1st: 403 kJ·mol−1
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2nd: 2632.1 kJ·mol−1
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3rd: 3859.4 kJ·mol−1
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Atomic radius
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248pm
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Covalent radius
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220±9 pm
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Van der Waals radius
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303pm
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Miscellanea
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Crystal structure
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body-centered cubic
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Magnetic ordering
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paramagnetic[1]
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Electrical resistivity
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(20 °C) 128 nΩ·m
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Thermal conductivity
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58.2 W·m−1·K−1
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Speed of sound(thin rod)
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(20 °C) 1300 m·s−1
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Young's modulus
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2.4 GPa
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Bulk modulus
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2.5 GPa
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Mohs hardness
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0.3
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Brinell hardness
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0.216 MPa
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CAS registry number
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7440-17-7
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Most stable isotopes
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Main article:Isotopes of rubidium
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·r
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Angrubidyo(Ininglesrubidium) mao angelementong kimikosatalaang peryodikonga may simbolo ngaRbug kaiphan nga atomik 37. Ang rubidyo mao angputhaw.
- ↑Magnetic susceptibility of the elements and inorganic compounds,in Handbook of Chemistry and Physics 81st edition, CRC press.