Uranium Yttrium Comparison
Periodic Table
Symbol
U
Y
Group Number
0
18
3
15
Period Number
7
5
Block
f block
d block
Element Family
Actinide
Transition Metal
CAS Number
7440611
28
7440655
25
Space Group Name
Cmcm
P63/mmc
Space Group Number
63.00
10
194.00
5
Facts
Interesting Facts
- Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
- Yttrium Metal is highly toxic.
- Yttrium Metal is highly reactive in nature hence not found free in nature.
Sources
Earth's crust, Mining, Ores of Minerals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Not Available
Johan Gadolin
Discovery
In 1789
In 1794
Abundance
Abundance In Universe
2 * 10-8 %
29
7 * 10-7 %
17
Abundance In Sun
~0.0000001 %
26
~0.0000001 %
26
Abundance In Meteorites
0.00 %
99+
0.00 %
21
Abundance In Earth's Crust
0.00 %
36
0.00 %
22
Abundance In Oceans
0.00 %
11
0.00 %
25
Uses
Uses & Benefits
- The main use of this metal include nuclear fuel which is used to generate electricity yin nuclear power stations.
- Synthetic elements like transuranium are made from Uranium metal.
- Yttrium metal is used in different alloys, as it increases the strength of aluminum Magnesium alloy. It is used for radar microwave filter.
- It is also used as a catalyst in ethene polymerisation.
Industrial Uses
Ammunition Industry, Chemical Industry
Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues
Alloys
Biological Properties
Toxicity
Toxic
Highly Toxic
Present in Human Body
No
Yes
In Blood
Not Available
0.00 Blood/mg dm-3
26
In Bone
Not Available
0.07 p.p.m.
25
Physical Properties
Melting Point
1,132.00 °C
39
1,523.00 °C
27
Boiling Point
3,818.00 °C
16
3,337.00 °C
21
Appearance
Physical State
Solid
Solid
Color
Silvery Gray
Silvery White
Luster
Metallic
NA
Hardness
Mohs Hardness
6.00
6
Not Available
Brinell Hardness
2,350.00 MPa
2
589.00 MPa
22
Vickers Hardness
1,960.00 MPa
2
Not Available
Speed of Sound
3,155.00 m/s
25
3,300.00 m/s
23
Optical Properties
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
U
Y
Isotopes
Known Isotopes
25
14
19
20
Electronegativity
Pauling Electronegativity
1.38
28
1.22
38
Sanderson Electronegativity
Not Available
0.65
29
Allred Rochow Electronegativity
1.22
26
1.11
29
Allen Electronegativity
Not Available
1.12
38
Electropositivity
Pauling Electropositivity
2.62
26
2.78
16
Ionization Energies
1st Energy Level
597.60 kJ/mol
99+
600.00 kJ/mol
99+
2nd Energy Level
1,420.00 kJ/mol
99+
1,180.00 kJ/mol
99+
3rd Energy Level
1,900.00 kJ/mol
99+
1,980.00 kJ/mol
99+
4th Energy Level
3,145.00 kJ/mol
99+
5,847.00 kJ/mol
10
5th Energy Level
Not Available
7,430.00 kJ/mol
14
6th Energy Level
Not Available
8,970.00 kJ/mol
17
7th Energy level
Not Available
11,190.00 kJ/mol
18
8th Energy Level
Not Available
12,450.00 kJ/mol
18
9th Energy Level
Not Available
14,110.00 kJ/mol
19
10th Energy Level
Not Available
18,400.00 kJ/mol
17
11th Energy Level
Not Available
19,900.00 kJ/mol
18
12th Energy Level
Not Available
36,090.00 kJ/mol
5
Electrochemical Equivalent
1.48 g/amp-hr
99+
1.11 g/amp-hr
99+
Electron Work Function
3.63 eV
30
3.10 eV
35
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Chemical Stability, Flammable, Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
92
26
39
99+
Electron Configuration
[Rn] 5f3 6d1 7s2
[Kr] 4d1 5s2
Crystal Structure
Orthorhombic (ORTH)
Hexagonal Close Packed (HCP)
Crystal Lattice
ORTH-Crystal-Structure-of-Uranium.jpg#100
HCP-Crystal-Structure-of-Yttrium.jpg#100
Atom
Number of Protons
92
26
39
99+
Number of Neutrons
146
13
50
99+
Number of Electrons
92
26
39
99+
Radius of an Atom
Atomic Radius
156.00 pm
29
180.00 pm
14
Covalent Radius
196.00 pm
14
190.00 pm
18
Van der Waals Radius
186.00 pm
33
200.00 pm
28
Atomic Weight
238.03 amu
21
88.91 amu
99+
Atomic Volume
12.59 cm3/mol
40
19.80 cm3/mol
21
Adjacent Atomic Numbers
Valence Electron Potential
170.00 (-eV)
4
48.00 (-eV)
30
Lattice Constant
295.08 pm
99+
364.74 pm
31
Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
1.57
16
Mechanical Properties
Density
Density At Room Temperature
19.10 g/cm3
17
4.47 g/cm3
99+
Density When Liquid (at m.p.)
17.30 g/cm3
7
4.24 g/cm3
99+
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
0.00 (Pa)
32
Vapor Pressure at 2000 K
0.01 (Pa)
20
4.27 (Pa)
10
Elasticity properties
Shear Modulus
111.00 GPa
10
25.60 GPa
30
Bulk Modulus
100.00 GPa
16
41.20 GPa
30
Young's Modulus
208.00 GPa
10
63.50 GPa
32
Poisson Ratio
0.23
30
0.24
26
Other Mechanical Properties
Ductile, Malleable
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
18.80
10
4.47
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Poor Conductor
Conductor
Resistivity
0.28 nΩ·m
99+
596.00 nΩ·m
8
Electrical Conductivity
0.04 106/cm Ω
37
0.02 106/cm Ω
99+
Electron Affinity
Not Available
29.60 kJ/mol
30
Thermal Properties
Specific Heat
0.12 J/(kg K)
40
0.30 J/(kg K)
18
Molar Heat Capacity
27.67 J/mol·K
15
26.53 J/mol·K
27
Thermal Conductivity
27.50 W/m·K
40
17.20 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
13.90 µm/(m·K)
27
10.60 µm/(m·K)
37
Enthalpy
Enthalpy of Vaporization
477.00 kJ/mol
13
393.00 kJ/mol
18
Enthalpy of Fusion
15.48 kJ/mol
19
17.15 kJ/mol
16
Enthalpy of Atomization
489.50 kJ/mol
14
418.00 kJ/mol
18
Standard Molar Entropy
50.20 J/mol.K
31
44.40 J/mol.K
33
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