Rubidyo

Rubidium
37Rb
K ↑ Rb ↓ Cs Periodic table krypton ← rubidium → strontium
Appearance
grey white
General properties
Name, simbolo, kaiphan	rubidium, Rb, 37
Pronunciation	Plantilya:IPAc-en Plantilya:Respell
Element category	puthaw
Group, period, block	1, 5, s
Standard atomic weight	85.4678(3)
Electron configuration	[Kr] 5s1 2, 8, 18, 8, 1
History
Discovery	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

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.

Galeriya sa hulagway

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