1 Periodic Table
1.1 Symbol
1.2 Group Number
1.4 Period Number
1.7 Block
1.8 Element Family
1.9 CAS Number
74401007440177
7429905
54386242
2.2 Space Group Name
2.3 Space Group Number
3 Facts
3.1 Interesting Facts
- Praseodymium metal is synthetically produced metal.
- Praseodymium is used as possible fuel for radioactive generators.
- Rubidium metal is 16th most common element found in the earth crust.
- Rubidium metal also found in minerals as well as seawater.
3.2 Sources
Found in Minerals, Mining, Ores of Minerals
Obtained from Lithium Production.
3.3 History
3.3.1 Who Discovered
Not Available
Robert Bunsen and Gustav Kirchhoff
3.3.2 Discovery
3.4 Abundance
3.4.1 Abundance In Universe
2 * 10-7 %1 * 10-6 %
5E-09
0.11
3.4.2 Abundance In Sun
~0.0000001 %~0.000003 %
1E-08
0.1
3.5.1 Abundance In Meteorites
3.6.1 Abundance In Earth's Crust
3.7.2 Abundance In Oceans
3.7.4 Abundance In Humans
4 Uses
4.1 Uses & Benefits
- The main use of Praseodymium include alloys. Praseodymium –Magnesium alloy is used in aircraft engines due to its high strength.
-
This metal is also used while making a permanent magnets.
- Rubidium's main application is in the glass manufacturing.
- Rubidium can very easily get ionized and hence it is used for ion engines, but it is still less efficient than that of Caesium.
4.1.1 Industrial Uses
4.1.2 Medical Uses
4.1.3 Other Uses
Alloys
Alloys, Research Purposes
4.2 Biological Properties
4.2.1 Toxicity
Moderately Toxic
Non Toxic
4.2.2 Present in Human Body
4.2.3 In Blood
NA2.49 Blood/mg dm-3
0
1970
4.2.4 In Bone
5 Physical
5.1 Melting Point
935.00 °C38.89 °C
27
3410
5.2 Boiling Point
3,130.00 °C688.00 °C
147
5660
5.3 Appearance
5.3.1 Physical State
5.3.2 Color
Grayish White
Grayish White
5.3.3 Luster
5.4 Hardness
5.4.1 Mohs Hardness
5.5.1 Brinell Hardness
481.00 MPa0.22 MPa
0.14
3490
5.5.2 Vickers Hardness
6.2 Speed of Sound
2,280.00 m/s1,300.00 m/s
818
16200
6.3 Optical Properties
6.3.1 Refractive Index
6.3.3 Reflectivity
6.4 Allotropes
6.4.1 α Allotropes
Not Available
Not Available
6.4.2 β Allotropes
Not Available
Not Available
6.4.3 γ Allotropes
Not Available
Not Available
7 Chemical
7.1 Chemical Formula
7.2 Isotopes
7.2.1 Known Isotopes
7.4 Electronegativity
7.4.1 Pauling Electronegativity
7.4.3 Sanderson Electronegativity
7.4.5 Allred Rochow Electronegativity
7.4.6 Mulliken-Jaffe Electronegativity
8.1.1 Allen Electronegativity
8.3 Electropositivity
8.3.1 Pauling Electropositivity
8.5 Ionization Energies
8.5.1 1st Energy Level
527.00 kJ/mol403.00 kJ/mol
375.7
26130
8.6.1 2nd Energy Level
1,020.00 kJ/mol2,633.00 kJ/mol
710.2162
28750
8.6.2 3rd Energy Level
2,086.00 kJ/mol3,860.00 kJ/mol
1600
34230
8.7.1 4th Energy Level
3,761.00 kJ/mol5,080.00 kJ/mol
2780
37066
8.8.2 5th Energy Level
5,551.00 kJ/mol6,850.00 kJ/mol
4305.2
97510
8.8.3 6th Energy Level
NA8,140.00 kJ/mol
5715.8
105800
8.8.5 7th Energy level
NA9,570.00 kJ/mol
7226.8
114300
8.8.7 8th Energy Level
NA13,120.00 kJ/mol
8857.4
125300
8.8.8 9th Energy Level
NA14,500.00 kJ/mol
14110
134700
8.8.9 10th Energy Level
NA26,740.00 kJ/mol
17100
144300
8.9.1 11th Energy Level
8.9.2 12th Energy Level
8.9.3 13th Energy Level
8.9.4 14th Energy Level
8.9.5 15th Energy Level
8.9.6 16th Energy Level
8.9.7 17th Energy Level
8.9.8 18th Energy Level
8.9.9 19th Energy Level
8.9.10 20th Energy Level
8.9.11 21st Energy Level
8.9.12 22nd Energy Level
8.9.13 23rd Energy Level
8.9.14 24th Energy Level
8.9.15 25th Energy Level
8.9.16 26th Energy Level
8.9.17 27th Energy Level
8.9.18 28th Energy Level
8.9.19 29th Energy Level
8.9.20 30th Energy Level
8.10 Electrochemical Equivalent
1.75 g/amp-hr3.19 g/amp-hr
0.16812
8.3209
8.11 Electron Work Function
8.12 Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes
Corrosion, Ionization, Radioactive Isotopes, Radioactivity
9 Atomic
9.1 Atomic Number
9.2 Electron Configuration
9.3 Crystal Structure
Hexagonal Close Packed (HCP)
Body Centered Cubic (BCC)
9.3.1 Crystal Lattice
9.4 Atom
9.4.1 Number of Protons
9.4.2 Number of Neutrons
9.4.3 Number of Electrons
9.5 Radius of an Atom
9.5.1 Atomic Radius
182.00 pm248.00 pm
112
265
9.5.2 Covalent Radius
203.00 pm220.00 pm
96
260
9.5.3 Van der Waals Radius
239.00 pm303.00 pm
139
348
9.6 Atomic Weight
140.91 amu85.47 amu
6.94
294
9.7 Atomic Volume
20.80 cm3/mol55.90 cm3/mol
1.39
71.07
9.8 Adjacent Atomic Numbers
9.8.1 Previous Element
9.8.2 Next Element
9.9 Valence Electron Potential
42.64 (-eV)9.47 (-eV)
8
392.42
9.10 Lattice Constant
367.25 pm558.50 pm
228.58
891.25
9.11 Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
9.12 Lattice C/A Ratio
10 Mechanical
10.1 Density
10.1.1 Density At Room Temperature
6.77 g/cm31.53 g/cm3
0.534
40.7
10.1.2 Density When Liquid (at m.p.)
6.50 g/cm31.46 g/cm3
0.512
20
10.2 Tensile Strength
10.3 Viscosity
10.4 Vapor Pressure
10.4.1 Vapor Pressure at 1000 K
10.4.2 Vapor Pressure at 2000 K
13.20 (Pa)NA
2.62E-10
774
10.5 Elasticity properties
10.5.1 Shear Modulus
10.5.2 Bulk Modulus
28.80 GPa2.50 GPa
1.6
462
10.5.3 Young's Modulus
37.30 GPa2.40 GPa
1.7
528
10.6 Poisson Ratio
10.7 Other Mechanical Properties
Ductile, Malleable
Ductile
11 Magnetic
11.1 Magnetic Characteristics
11.1.1 Specific Gravity
11.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
11.1.3 Permeability
11.1.4 Susceptibility
11.2 Electrical Properties
11.2.1 Electrical Property
11.2.2 Resistivity
0.70 nΩ·m128.00 nΩ·m
0.18
961
11.2.3 Electrical Conductivity
0.01 106/cm Ω0.08 106/cm Ω
0.00666
0.63
11.2.4 Electron Affinity
50.00 kJ/mol46.90 kJ/mol
0
222.8
12 Thermal
12.1 Specific Heat
0.19 J/(kg K)0.36 J/(kg K)
0.11
3.6
12.2 Molar Heat Capacity
27.20 J/mol·K31.06 J/mol·K
16.443
62.7
12.3 Thermal Conductivity
12.50 W/m·K58.20 W/m·K
6.3
429
12.4 Critical Temperature
12.5 Thermal Expansion
6.70 µm/(m·K)90.00 µm/(m·K)
4.5
97
12.6 Enthalpy
12.6.1 Enthalpy of Vaporization
296.80 kJ/mol69.20 kJ/mol
7.32
799.1
12.6.2 Enthalpy of Fusion
6.89 kJ/mol2.19 kJ/mol
2.1
35.23
12.6.3 Enthalpy of Atomization
368.00 kJ/mol82.00 kJ/mol
61.5
837
12.7 Standard Molar Entropy
73.20 J/mol.K76.80 J/mol.K
9.5
198.1