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Technetium vs Americium

Technetium
Americium
Americium vs Technetium


Periodic Table
Symbol
Tc   
Am   
Group Number
7   
11
Not Available   
Period Number
5   
7   
Block
d block   
f block   
Element Family
Transition Metal   
Actinide   
CAS Number
7440268   
99+
7440359   
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.
  
  • Americium metal is produced by bombarding Plutonium with Neutrons.
  • Americium metal was discovered as a by-product while testing an atomic bomb (Manhattan Project).
  
Sources
Made by Bombarding Molybdenum with Deuterons   
Obtained By Bombarding Plutonium with Neutrons   
History
  
  
Who Discovered
Emilio Segrè and Carlo Perriero   
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso   
Discovery
In 1937   
In 1944   
Abundance
  
  
Uses
Uses & Benefits
  • Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.
  
  • Americium metal is used in smoke detection alarms.
  • In the future, this metal has a potential to be used in batteries of spacecrafts.
  
Industrial Uses
NA   
NA   
Medical Uses
NA   
NA   
Other Uses
Alloys, Nuclear Research, Research Purposes   
Alloys, Nuclear Research, Research Purposes   
Biological Properties
  
  
Toxicity
Low Toxic   
Toxic   
Present in Human Body
No   
No   
In Blood
0.00 Blood/mg dm-3   
37
0.00 Blood/mg dm-3   
37
In Bone
0.00 p.p.m.   
36
0.00 p.p.m.   
36
Physical Properties
Melting Point
2,200.00 °C   
9
994.00 °C   
99+
Boiling Point
4,877.00 °C   
7
2,607.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Shiny Gray   
Silvery White   
Luster
NA   
NA   
Hardness
  
  
Speed of Sound
16,200.00 m/s   
1
Not Available   
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   
Am   
Isotopes
  
  
Known Isotopes
18   
21
16   
23
Electronegativity
  
  
Pauling Electronegativity
1.90   
11
1.30   
32
Allred Rochow Electronegativity
1.36   
20
1.20   
27
Allen Electronegativity
1.51   
28
Not Available   
Electropositivity
  
  
Pauling Electropositivity
2.10   
99+
2.70   
22
Ionization Energies
  
  
1st Energy Level
702.00 kJ/mol   
36
578.00 kJ/mol   
99+
2nd Energy Level
1,470.00 kJ/mol   
99+
1,158.00 kJ/mol   
99+
3rd Energy Level
2,850.00 kJ/mol   
33
2,132.00 kJ/mol   
99+
4th Energy Level
Not Available   
3,493.00 kJ/mol   
99+
Electrochemical Equivalent
0.52 g/amp-hr   
99+
3.02 g/amp-hr   
17
Electron Work Function
Not Available   
Not Available   
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Atomic Properties
Atomic Number
43   
99+
95   
23
Electron Configuration
[Kr] 4d5 5s2   
[Rn] 5f7 7s2   
Crystal Structure
Hexagonal Close Packed (HCP)   
Double Hexagonal Close Packed (DHCP)   
Crystal Lattice
HCP-Crystal-Structure-of-Technetium.jpg#100   
DHCP-Crystal-Structure-of-Americium.jpg#100   
Atom
  
  
Number of Protons
43   
99+
95   
23
Number of Neutrons
55   
99+
148   
12
Number of Electrons
43   
99+
95   
23
Radius of an Atom
  
  
Atomic Radius
136.00 pm   
99+
173.00 pm   
21
Covalent Radius
147.00 pm   
37
180.00 pm   
21
Van der Waals Radius
200.00 pm   
28
244.00 pm   
10
Atomic Weight
98.00 amu   
99+
243.00 amu   
20
Atomic Volume
8.50 cm3/mol   
99+
17.86 cm3/mol   
29
Adjacent Atomic Numbers
  
  
Previous Element
Molybdenum
  
Plutonium
  
Next Element
Ruthenium
  
Curium
  
Valence Electron Potential
180.00 (-eV)   
3
44.00 (-eV)   
40
Lattice Constant
273.50 pm   
99+
346.81 pm   
99+
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, 2 π/3   
Lattice C/A Ratio
1.60   
5
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
11.00 g/cm3   
34
12.00 g/cm3   
30
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
13
Elasticity properties
  
  
Poisson Ratio
Not Available   
Not Available   
Other Mechanical Properties
NA   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
11.50   
24
13.67   
15
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Unknown   
Resistivity
200.00 nΩ·m   
18
0.69 nΩ·m   
99+
Electrical Conductivity
0.07 106/cm Ω   
30
0.02 106/cm Ω   
99+
Electron Affinity
53.00 kJ/mol   
18
Not Available   
Thermal Properties
Specific Heat
0.21 J/(kg K)   
29
0.11 J/(kg K)   
99+
Molar Heat Capacity
24.27 J/mol·K   
99+
62.70 J/mol·K   
1
Thermal Conductivity
50.60 W/m·K   
30
10.00 W/m·K   
99+
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
7.10 µm/(m·K)   
99+
Not Available   
Enthalpy
  
  
Enthalpy of Vaporization
660.00 kJ/mol   
6
Not Available   
Enthalpy of Fusion
23.01 kJ/mol   
9
14.39 kJ/mol   
24
Enthalpy of Atomization
649.00 kJ/mol   
8
268.00 kJ/mol   
40
Standard Molar Entropy
181.10 J/mol.K   
2
Not Available   
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