Technetium vs Dysprosium
Periodic Table
Symbol
Tc
Dy
Group Number
7
11
Not Available
Period Number
5
6
Block
d block
f block
Element Family
Transition Metal
Lanthanide
CAS Number
7440268
99+
7429916
99+
Space Group Name
P63/mmc
P63/mmc
Space Group Number
194.00
5
194.00
5
Facts
Interesting Facts
- Original name of Technetium was Masurium.
- At the time of its discovery it found in sample of Molybdenum.
- Dysprosium acts stable in air at room temperature.
- Dysprosium behaves very much like paramagnetic metal.
Sources
Made by Bombarding Molybdenum with Deuterons
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Emilio Segrè and Carlo Perriero
Lecoq de Boisbaudran
Discovery
In 1937
In 1886
Abundance
Abundance In Universe
Not Available
2 * 10-7 %
22
Abundance In Sun
~-9999 %
~0.0000002 %
25
Abundance In Meteorites
Not Available
0.00 %
33
Abundance In Earth's Crust
Not Available
0.00 %
28
Abundance In Oceans
Not Available
0.00 %
35
Uses
Uses & Benefits
- Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
- Dysprosium metal is highly reactive due to which it pure form is not as usual as its alloy.
- Thi metals alloy is used in magnate as it is resistance to high temperature.
Industrial Uses
NA
NA
Medical Uses
NA
NA
Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys, Nuclear Research
Biological Properties
Toxicity
Low Toxic
Mildly Toxic
Present in Human Body
No
No
In Blood
0.00 Blood/mg dm-3
37
Not Available
In Bone
0.00 p.p.m.
36
Not Available
Physical Properties
Melting Point
2,200.00 °C
9
1,407.00 °C
32
Boiling Point
4,877.00 °C
7
2,562.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Shiny Gray
Silvery White
Luster
NA
Metallic
Hardness
Brinell Hardness
Not Available
500.00 MPa
23
Vickers Hardness
Not Available
540.00 MPa
20
Speed of Sound
16,200.00 m/s
1
2,710.00 m/s
33
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
Tc
Dy
Isotopes
Known Isotopes
18
21
29
10
Electronegativity
Pauling Electronegativity
1.90
11
1.22
38
Allred Rochow Electronegativity
1.36
20
1.10
30
Allen Electronegativity
1.51
28
Not Available
Electropositivity
Pauling Electropositivity
2.10
99+
2.78
16
Ionization Energies
1st Energy Level
702.00 kJ/mol
36
573.00 kJ/mol
99+
2nd Energy Level
1,470.00 kJ/mol
99+
1,130.00 kJ/mol
99+
3rd Energy Level
2,850.00 kJ/mol
33
2,200.00 kJ/mol
99+
4th Energy Level
Not Available
3,990.00 kJ/mol
37
Electrochemical Equivalent
0.52 g/amp-hr
99+
2.02 g/amp-hr
29
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
43
99+
66
99+
Electron Configuration
[Kr] 4d5 5s2
[Xe] 4f9 6s2
Crystal Structure
Hexagonal Close Packed (HCP)
Hexagonal Close Packed (HCP)
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100
HCP-Crystal-Structure-of-Dysprosium.jpg#100
Atom
Number of Protons
43
99+
66
99+
Number of Neutrons
55
99+
96
35
Number of Electrons
43
99+
66
99+
Radius of an Atom
Atomic Radius
136.00 pm
99+
178.00 pm
16
Covalent Radius
147.00 pm
37
192.00 pm
17
Van der Waals Radius
200.00 pm
28
229.00 pm
20
Atomic Weight
98.00 amu
99+
162.50 amu
99+
Atomic Volume
8.50 cm3/mol
99+
19.00 cm3/mol
23
Adjacent Atomic Numbers
Valence Electron Potential
180.00 (-eV)
3
47.40 (-eV)
32
Lattice Constant
273.50 pm
99+
359.30 pm
37
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.60
5
1.57
15
Mechanical Properties
Density
Density At Room Temperature
11.00 g/cm3
34
8.54 g/cm3
99+
Density When Liquid (at m.p.)
Not Available
8.37 g/cm3
25
Tensile Strength
Not Available
120.00 MPa
15
Viscosity
Not Available
Not Available
Vapor Pressure
Elasticity properties
Shear Modulus
Not Available
24.70 GPa
31
Bulk Modulus
Not Available
40.50 GPa
31
Young's Modulus
Not Available
61.40 GPa
33
Poisson Ratio
Not Available
0.25
25
Other Mechanical Properties
NA
Sectile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
11.50
24
8.55
38
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
Conductor
Resistivity
200.00 nΩ·m
18
926.00 nΩ·m
2
Electrical Conductivity
0.07 106/cm Ω
30
0.01 106/cm Ω
99+
Electron Affinity
53.00 kJ/mol
18
50.00 kJ/mol
21
Thermal Properties
Specific Heat
0.21 J/(kg K)
29
0.17 J/(kg K)
34
Molar Heat Capacity
24.27 J/mol·K
99+
27.70 J/mol·K
14
Thermal Conductivity
50.60 W/m·K
30
10.70 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
7.10 µm/(m·K)
99+
9.90 µm/(m·K)
40
Enthalpy
Enthalpy of Vaporization
660.00 kJ/mol
6
230.00 kJ/mol
39
Enthalpy of Fusion
23.01 kJ/mol
9
11.05 kJ/mol
32
Enthalpy of Atomization
649.00 kJ/mol
8
301.00 kJ/mol
36
Standard Molar Entropy
181.10 J/mol.K
2
75.60 J/mol.K
7
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