Curium vs Yttrium
Periodic Table
Symbol
Cm
Y
Group Number
Not Available
3
15
Period Number
7
5
Block
f block
d block
Element Family
Actinide
Transition Metal
CAS Number
7440519
36
7440655
25
Space Group Name
Not Available
P63/mmc
Space Group Number
Not Available
194.00
5
Facts
Interesting Facts
- Curium metal does not occur free in nature.
- Curium metal is a synthetically produced metal.
- Yttrium Metal is highly toxic.
- Yttrium Metal is highly reactive in nature hence not found free in nature.
Sources
Bombarding Plutonium with Helium Ions
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso
Johan Gadolin
Discovery
In 1944
In 1794
Abundance
Abundance In Universe
Not Available
7 * 10-7 %
17
Abundance In Sun
~-9999 %
~0.0000001 %
26
Abundance In Meteorites
Not Available
0.00 %
21
Abundance In Earth's Crust
Not Available
0.00 %
22
Abundance In Oceans
Not Available
0.00 %
25
Uses
Uses & Benefits
- Curium metal is used to provide power to electrical equipment for space missions.
- 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
NA
Electrical Industry, Electronic Industry
Medical Uses
NA
NA
Other Uses
Research Purposes
Alloys
Biological Properties
Toxicity
Unknown
Highly Toxic
Present in Human Body
No
Yes
In Blood
0.00 Blood/mg dm-3
37
0.00 Blood/mg dm-3
26
In Bone
0.00 p.p.m.
36
0.07 p.p.m.
25
Physical Properties
Melting Point
1,340.00 °C
34
1,523.00 °C
27
Boiling Point
3,110.00 °C
30
3,337.00 °C
21
Appearance
Physical State
Solid
Solid
Color
Silver
Silvery White
Luster
Metallic
NA
Hardness
Brinell Hardness
Not Available
589.00 MPa
22
Speed of Sound
Not Available
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
Cm
Y
Isotopes
Known Isotopes
15
24
19
20
Electronegativity
Pauling Electronegativity
1.30
32
1.22
38
Sanderson Electronegativity
Not Available
0.65
29
Allred Rochow Electronegativity
1.20
27
1.11
29
Allen Electronegativity
Not Available
1.12
38
Electropositivity
Pauling Electropositivity
2.70
22
2.78
16
Ionization Energies
1st Energy Level
581.00 kJ/mol
99+
600.00 kJ/mol
99+
2nd Energy Level
1,196.00 kJ/mol
99+
1,180.00 kJ/mol
99+
3rd Energy Level
2,026.00 kJ/mol
99+
1,980.00 kJ/mol
99+
4th Energy Level
3,550.00 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
3.07 g/amp-hr
16
1.11 g/amp-hr
99+
Electron Work Function
Not Available
3.10 eV
35
Other Chemical Properties
Ionization, Radioactive Isotopes
Chemical Stability, Flammable, Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
96
22
39
99+
Electron Configuration
[Rn] 5f7 6d1 7s2
[Kr] 4d1 5s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100
HCP-Crystal-Structure-of-Yttrium.jpg#100
Atom
Number of Protons
96
22
39
99+
Number of Neutrons
151
10
50
99+
Number of Electrons
96
22
39
99+
Radius of an Atom
Atomic Radius
174.00 pm
20
180.00 pm
14
Covalent Radius
169.00 pm
26
190.00 pm
18
Van der Waals Radius
200.00 pm
28
200.00 pm
28
Atomic Weight
247.00 amu
18
88.91 amu
99+
Atomic Volume
18.28 cm3/mol
26
19.80 cm3/mol
21
Adjacent Atomic Numbers
Valence Electron Potential
44.50 (-eV)
38
48.00 (-eV)
30
Lattice Constant
Not Available
364.74 pm
31
Lattice Angles
NA
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
1.57
16
Mechanical Properties
Density
Density At Room Temperature
13.51 g/cm3
25
4.47 g/cm3
99+
Density When Liquid (at m.p.)
13.85 g/cm3
10
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
Not Available
4.27 (Pa)
10
Elasticity properties
Shear Modulus
Not Available
25.60 GPa
30
Bulk Modulus
Not Available
41.20 GPa
30
Young's Modulus
Not Available
63.50 GPa
32
Poisson Ratio
Not Available
0.24
26
Other Mechanical Properties
Unknown
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
13.51
17
4.47
99+
Magnetic Ordering
Antiferromagnetic
Paramagnetic
Electrical Properties
Electrical Property
Unknown
Conductor
Resistivity
1.25 nΩ·m
99+
596.00 nΩ·m
8
Electrical Conductivity
Not Available
0.02 106/cm Ω
99+
Electron Affinity
Not Available
29.60 kJ/mol
30
Thermal Properties
Specific Heat
Not Available
0.30 J/(kg K)
18
Molar Heat Capacity
Not Available
26.53 J/mol·K
27
Thermal Conductivity
Not Available
17.20 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
10.60 µm/(m·K)
37
Enthalpy
Enthalpy of Vaporization
Not Available
393.00 kJ/mol
18
Enthalpy of Fusion
15.00 kJ/mol
21
17.15 kJ/mol
16
Enthalpy of Atomization
Not Available
418.00 kJ/mol
18
Standard Molar Entropy
Not Available
44.40 J/mol.K
33
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