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Nihonium vs Americium

Nihonium
Americium
Americium vs Nihonium


Periodic Table
Symbol
Nh  
Am  
Group Number
13  
5
10  
8
Period Number
7  
7  
Block
p block  
f block  
Element Family
Probably Post-​Transition  
Actinide  
CAS Number
54084707  
6
7440359  
99+
Space Group Name
-  
P63/mmc  
Space Group Number
194.00  
7
194.00  
7
Facts
Interesting Facts
Nihonium is a synthetic chemical element and is highly radioactive.  
  • 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
Synthetically Produced  
Obtained By Bombarding Plutonium with Neutrons  
History
  
  
Who Discovered
Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory  
Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso  
Discovery
In 2003  
In 1944  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
35
Abundance In Sun
-  
0.00 %  
30
Abundance In Meteorites
-  
0.00 %  
99+
Abundance In Earth's Crust
-  
0.00 %  
99+
Abundance In Oceans
-  
-  
Abundance In Humans
-  
0.00 %  
24
Uses
Uses & Benefits
  • Currently known uses of Ununtrium metal are limited to research purpose only.
  
  • 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
-  
-  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
-  
Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
29
0.00 Blood/mg dm-3  
40
In Bone
0.20 p.p.m.  
27
0.00 p.p.m.  
99+
Physical
Melting Point
430.00 °C  
99+
994.00 °C  
99+
Boiling Point
1,130.00 °C  
99+
2,607.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silvery White  
Luster
Unknown Luster  
-  
Hardness
  
  
Mohs Hardness
-  
6.00  
6
Brinell Hardness
600.00 MPa  
24
260.00 MPa  
99+
Vickers Hardness
350.00 MPa  
99+
600.00 MPa  
28
Speed of Sound
3,600.00 m/s  
29
2,750.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.30  
99+
Reflectivity
60.00 %  
23
64.00 %  
19
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Nh  
Am  
Isotopes
  
  
Known Isotopes
7  
31
16  
23
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.30  
33
Sanderson Electronegativity
1.90  
13
1.30  
25
Allred Rochow Electronegativity
1.30  
25
1.20  
28
Mulliken-Jaffe Electronegativity
1.00  
99+
1.30  
33
Allen Electronegativity
0.70  
99+
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.70  
22
Ionization Energies
  
  
1st Energy Level
704.90 kJ/mol  
34
578.00 kJ/mol  
99+
2nd Energy Level
2,238.50 kJ/mol  
7
1,158.00 kJ/mol  
99+
3rd Energy Level
3,023.30 kJ/mol  
26
2,132.00 kJ/mol  
99+
4th Energy Level
4,351.50 kJ/mol  
39
3,493.00 kJ/mol  
99+
5th Energy Level
5,692.60 kJ/mol  
99+
5,780.00 kJ/mol  
99+
6th Energy Level
7,000.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
7th Energy level
7,040.00 kJ/mol  
40
5,780.00 kJ/mol  
99+
8th Energy Level
7,040.00 kJ/mol  
36
5,780.00 kJ/mol  
99+
9th Energy Level
7,040.00 kJ/mol  
33
5,780.00 kJ/mol  
99+
10th Energy Level
7,040.00 kJ/mol  
37
5,780.00 kJ/mol  
99+
11th Energy Level
7,040.00 kJ/mol  
35
5,780.00 kJ/mol  
99+
12th Energy Level
70,000.00 kJ/mol  
5
62,400.00 kJ/mol  
11
13th Energy Level
7,000.00 kJ/mol  
34
5,780.00 kJ/mol  
99+
14th Energy Level
7,000.00 kJ/mol  
24
5,780.00 kJ/mol  
99+
15th Energy Level
70,000.00 kJ/mol  
30
62,400.00 kJ/mol  
39
16th Energy Level
70,000.00 kJ/mol  
25
57,800.00 kJ/mol  
99+
17th Energy Level
540.00 kJ/mol  
99+
578.00 kJ/mol  
99+
18th Energy Level
3,200.00 kJ/mol  
99+
5,780.00 kJ/mol  
99+
19th Energy Level
540.20 kJ/mol  
99+
578.00 kJ/mol  
99+
20th Energy Level
700.00 kJ/mol  
36
578.00 kJ/mol  
99+
21st Energy Level
1,130.00 kJ/mol  
29
5,780.00 kJ/mol  
22
22nd Energy Level
558.00 kJ/mol  
99+
578.00 kJ/mol  
99+
23rd Energy Level
7,000.00 kJ/mol  
11
5,780.00 kJ/mol  
23
24th Energy Level
700.00 kJ/mol  
29
578.00 kJ/mol  
99+
25th Energy Level
0.00 kJ/mol  
99+
578.00 kJ/mol  
99+
26th Energy Level
586.20 kJ/mol  
99+
578.00 kJ/mol  
99+
27th Energy Level
704.90 kJ/mol  
28
578.00 kJ/mol  
99+
28th Energy Level
704.90 kJ/mol  
33
578.00 kJ/mol  
99+
29th Energy Level
704.90 kJ/mol  
34
578.00 kJ/mol  
99+
30th Energy Level
704.00 kJ/mol  
28
578.00 kJ/mol  
99+
Electrochemical Equivalent
3.00 g/amp-hr  
21
3.02 g/amp-hr  
20
Electron Work Function
4.90 eV  
12
4.30 eV  
25
Other Chemical Properties
Chemical Stability, Ionization  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
113  
5
95  
23
Electron Configuration
[Rn] 5f14 6d10 7s2 7p1  
[Rn] 5f7 7s2  
Crystal Structure
Not Known  
Double Hexagonal Close Packed (DHCP)  
Crystal Lattice
Unknown-Crystal-Structure-of-Ununtrium.jpg#100  
DHCP-Crystal-Structure-of-Americium.jpg#100  
Atom
  
  
Number of Protons
113  
5
95  
23
Number of Neutrons
150  
12
148  
13
Number of Electrons
113  
5
95  
23
Radius of an Atom
  
  
Atomic Radius
170.00 pm  
24
173.00 pm  
23
Covalent Radius
170.00 pm  
27
180.00 pm  
23
Van der Waals Radius
320.00 pm  
3
244.00 pm  
14
Atomic Weight
286.00 amu  
4
243.00 amu  
20
Atomic Volume
21.10 cm3/mol  
24
17.86 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Copernicium
  
Plutonium
  
Next Element
Flerovium
  
Curium
  
Valence Electron Potential
6.20 (-eV)  
99+
44.00 (-eV)  
99+
Lattice Constant
0.00 pm  
99+
346.81 pm  
99+
Lattice Angles
-  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
1.58  
35
1.58  
34
Mechanical
Density
  
  
Density At Room Temperature
16.00 g/cm3  
19
12.00 g/cm3  
32
Density When Liquid (at m.p.)
16.00 g/cm3  
19
13.67 g/cm3  
26
Tensile Strength
80.00 MPa  
29
80.00 MPa  
29
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
13
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
24
Elasticity properties
  
  
Shear Modulus
40.00 GPa  
19
26.00 GPa  
36
Bulk Modulus
0.00 GPa  
99+
44.00 GPa  
32
Young's Modulus
12.20 GPa  
99+
58.00 GPa  
36
Poisson Ratio
0.30  
14
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
16.00  
21
13.67  
26
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
5
0.00 H/m  
16
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
0.32 nΩ·m  
99+
0.69 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.02 106/cm Ω  
99+
Electron Affinity
0.00 kJ/mol  
99+
63.90 kJ/mol  
18
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.11 J/(kg K)  
99+
Molar Heat Capacity
27.00 J/mol·K  
29
62.70 J/mol·K  
1
Thermal Conductivity
1.70 W/m·K  
99+
10.00 W/m·K  
99+
Critical Temperature
700.00 K  
99+
1,449.00 K  
99+
Thermal Expansion
6.20 µm/(m·K)  
99+
13.60 µm/(m·K)  
32
Enthalpy
  
  
Enthalpy of Vaporization
410.80 kJ/mol  
23
161.00 kJ/mol  
99+
Enthalpy of Fusion
-  
14.39 kJ/mol  
27
Enthalpy of Atomization
320.70 kJ/mol  
99+
268.00 kJ/mol  
99+
Standard Molar Entropy
65.00 J/mol.K  
17
63.10 J/mol.K  
23
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