37
Rb
Rubidium
85.46783
Basic Information
Bohr Model
Descriptive Numbers
Mass
Periodic Position
Classification
Abundance
Color
Atomic Radius
Temperature
Density
Heat
Speed of Sound
Electrical Resistance
Magnetic Properties
Elasticity
Hardness
Etymology
Discovery & Isolation
Production & Use
Radioactivity
Electron Affinity
Dipole Polarity
Lattice
Electron & Quantum
List of Compounds
Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
7440-17-7
CID Number
CID5357696
DOT Number
1423
RTECS Number
RTECSVL8500000
Mendeleev Number
4
Pettifor Number
9
Space Group Number
229
Glawe Number
9
Mass
Atomic Mass
85.46783 Da
Uncertainty
0.0003
Periodic Position
X Position
1
Y Position
5
Period
5
Group
1
Classification
Block
s
Category
Alkaline Metals
Geochemical
Alkali Metal
Goldschmidt
Lithophilic
Electrical Type
Conductive
Abundance
Urban Soil
0.058 mg/kg
Seawater
1.2e-7 kg/L
Sun
0.000011 mole ratio to silicon
Earth Crust
0.00009 g
Solar System
0.000007 mole ratio to silicon
Meteorites
0.00032 %
Color
Jmol
#702EB0
Molcas Gv
#702EB0
CPK
#FF1493
Atomic Radius
Empirical
235
Calculated
265
Van Der Waals
303
Batsanov
290
Rahm
240
Uff
411.4
Mm3
325
Alvarez
321
Bragg
225
Truhlar
303
Covalent (Single Bound)
211
Covalent (Cordero)
220
Covalent (Pyykko)
210
Covalent (Pyykko Double)
202
Mendeleev
216
C12
248
Metallic
248
Temperature
Melting/Freeze (USE)
312.45 °K
Melting/Freeze (WEL)
312.46 °K
Melting/Freeze (CRC)
312.3 °K
Melting/Freeze (LNG)
312.31 °K
Boiling/Density (USE)
961 °K
Boiling/Density (WEL)
961 °K
Boiling/Density (CRC)
961 °K
Boiling/Density (LNG)
964 °K
Boiling/Density (Zhang)
961 °K
Critical Temperature
2093 °K
Critical Pressure
16 MPa
Density
STP
1.532 kg/cm³
Solid (WEL)
1532 kg/cm³
Solid (CRC)
1530 kg/cm³
Solid (LNG)
1532 kg/cm³
Liquid (CR2)
1460 kg/cm³
Heat
Molar Volume
55.76 cm³/mol
Atomic Volume
55.9 cm³
Heat Of Fusion USE
2.2 kJ/mol
Heat Of Fusion CRC
2.19 kJ/mol
Heat Of Fusion LNG
2.19 kJ/mol
Heat Of Fusion WEL
2.19 kJ/mol
Evaporation USE
75.8 kJ/mol
Evaporation LNG
75.77 kJ/mol
Evaporation WEL
72 kJ/mol
Evaporation Zhang
69 kJ/mol
Molar Heat
31.06 J/molK
Heat Capacity USE
0.36 J/gK
Heat Capacity CRC
31.06 J/gK
Heat Capacity LNG
31.06 J/gK
Heat Capacity WEL
31.1 J/gK
Thermal Conductivity
58.2 W/m*K
Adiabatic Index
N/A
Speed of Sound
Extensional
1300 m/s
Electrical Resistance
80k
26.5 nΩm
273k
115 nΩm
293k
128 nΩm
298k
131 nΩm
300k
133 nΩm
Magnetic Properties
Order
paramanyetic
Susceptibility
2.6e-9 m3/kg
Elasticity
Bulk Modulus
2.5 GPa
Youngs Modulus
2.4 GPa
Hardness
Mohs
0.3
Brinell
0.216
Etymology
Description
It is a soft, silvery, metal element. It is found in the first group of the periodic table. The naturally occurring isotope Rb-97 is radioactive. It has similar properties to other elements in the first group, such as spontaneous ignition in air, and is extremely radioactive. In 1861 W. Bunsen and G.R. It was discovered spectroscopically by Kirchoff.
Language Of Origin
Latin
Origin Of Word
From the Latin word rubidus, meaning "dark red"
Meaning
dark red
Symbol Origin
descriptive (color)
Etymological Description
From the Latin rubidus meaning "dark red". It got this name because of the color of the spectrum line.
Discovery & Isolation
Observed/Predicted By
R. Bunsen ve G. R. Kirchhoff
Observed/Discovery Year
1861
Discovery Location
Isolated Sample By
Hevesy
Production & Use
Sources
It is abundant but so common that its production is limited. It is generally obtained from lithium production.
Uses
It is used in catalysts, photo cells, vacuum and cathode ray tubes.
Radioactivity
Half Life
Stable
Lifetime
Stable
Neutron Mass Absorption
0.0003
Neutron Cross Section
0.38
Electron Affinity
Electron Affinity (eV)
0.48592
Electron Affinity (kJ/mol)
46.884
Electron Affinity (pauling)
0.82
Electron Affinity (allen)
4.177
Electron Affinity (ghosh)
0.104686
Dipole Polarity
Accepted
319.8
Uncertainty
0.3
C6 GB
4660
C6 Coefficient
4769
Lattice
Constant Internal Default Radius
5.59
Constant
558.5, 558.5, 558.5
Strucutre
BCC
Angles
p/2, p/2, p/2
Electron & Quantum
Oxidation States
−1,1
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1
Quantum Number
2S1/2
Electron Configuration Semantic
[DKK] 5s1
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
8
Shells-4
1
Ionization Energies-0
403
Ionization Energies-1
2633
Ionization Energies-2
3860
Ionization Energies-3
5080
Ionization Energies-4
6850
Ionization Energies-5
8140
Ionization Energies-6
9570
Ionization Energies-7
13120
Ionization Energies-8
14500
Ionization Energies-9
26740
List of Compounds
1-10 of 25 compounds
| Formula | Names |
|---|---|
| Rb | rubidium rubidium metal |
| RbBr | rubidium bromide hydrobromic acid rubidium salt rubidium(+1) cation bromide rubidium-bromid |
| RbCl | rubidium chloride rubidium(+1) cation chloride rubidium-chlorid rubidium monochloride |
| RbF | rubidium fluoride rubidium(+1) cation fluoride rubidium monofluoride |
| RbI | rubidium iodide hydriodic acid rubidium salt rubidium(+1) cation iodide rubidium-iodid |
| RbO2 | rubidium superoxide |
| Rb2Se | rubidium selenide dirubidium selenide |
| Rb3Sb | rubidium antimonide antimony, compound with rubidium (1:3) |
| BF4Rb | rubidium fluoroborate |
| Br2ClRb | rubidium chlorobromo bromide rubidium bromide-bromine chloride adduct |
