Rubidium

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Rubidium, 37Rb
Rb5.JPG
Rubidium
Pípè /rˈbɪdiəm/ (roo-BID-ee-əm)
Ìhànsójúgrey white
Ìwúwo átọ̀mù Ar, std(Rb)85.4678(3)[1]
Rubidium ní orí tábìlì àyè
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
K

Rb

Cs
kryptonrubidiumstrontium
Nọ́mbà átọ̀mù (Z)37
Ẹgbẹ́group 1: H and alkali metals
Àyèàyè 5
Àdìpọ̀Àdìpọ̀-s
Ẹ̀ka ẹ́límẹ́ntì  Alkali metal
Ìtò ẹ̀lẹ́ktrọ́nù[Kr] 5s1
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 8, 1
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́312.46 K ​(39.31 °C, ​102.76 °F)
Ígbà ìhó961 K ​(688 °C, ​1270 °F)
Kíki (near r.t.)1.532 g/cm3
when liquid (at m.p.)1.46 g/cm3
Critical point(extrapolated) 2093 K, 16 MPa
Heat of fusion2.19 kJ/mol
Heat of 75.77 kJ/mol
Molar heat capacity31.060 J/(mol·K)
 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, +1 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 0.82
Atomic radiusempirical: 248 pm
Covalent radius220±9 pm
Van der Waals radius303 pm
Color lines in a spectral range
Spectral lines of rubidium
Other properties
Natural occurrenceprimordial
Crystal structure ​(bcc)
Body-centered cubic crystal structure for rubidium
Speed of sound thin rod1300 m/s (at 20 °C)
Thermal conductivity58.2 W/(m·K)
Electrical resistivity128 n Ω·m (at 20 °C)
Magnetic orderingparamagnetic[2]
Young's modulus2.4 GPa
Bulk modulus2.5 GPa
Mohs hardness0.3
Brinell hardness0.216 MPa
CAS Number7440-17-7
Main isotopes of rubidium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
83Rb syn 86.2 d ε - 83Kr
γ 0.52, 0.53,
0.55
-
84Rb syn 32.9 d ε - 84Kr
β+ 1.66, 0.78 84Kr
γ 0.881 -
β 0.892 84Sr
85Rb 72.168% 85Rb is stable with 48 neutrons
86Rb syn 18.65 d β 1.775 86Sr
γ 1.0767 -
87Rb 27.835% 4.88 × 1010 y β 0.283 87Sr
Àdàkọ:Category-inline
| references


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Meija, Juris; Coplen, Tyler B.; Berglund, Michael; Brand, Willi A.; De Bièvre, Paul; Gröning, Manfred; Holden, Norman E.; Irrgeher, Johanna et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry 88 (3): 265–91. doi:10.1515/pac-2015-0305. 
  2. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.