Bismuth Neptunium Comparison
Periodic Table
Symbol
Bi
Np
Group Number
15
3
Not Available
Period Number
6
7
Block
p block
f block
Element Family
Post-Transition
Actinide
CAS Number
7440699
22
7439998
99+
Space Group Name
C12/m1
Pnma
Space Group Number
12.00
12
62.00
11
Facts
Interesting Facts
- Bismuth metal is soluble and reacts with concentrated nitric acid.
- It oxides are used as a yellow pigment in paint. Bismuth chloride oxide BiClO gives a pearly texture to cosmetics.
Not Available
Sources
Found in Minerals, Mining, Ores of Minerals
Made by Bombarding Uranium with Neutrons, Ores of metals
History
Who Discovered
Claude François Geoffroy
Edwin McMillan and Philip H. Abelson
Discovery
In 1753
In 1940
Abundance
Abundance In Universe
7 * 10-8 %
25
Not Available
Abundance In Sun
~0.000006 %
14
~-9999 %
Abundance In Meteorites
0.00 %
99+
Not Available
Abundance In Earth's Crust
0.00 %
99+
Not Available
Abundance In Oceans
0.00 %
24
Not Available
Uses
Uses & Benefits
- Tin and bismuth alloys have a very low melting point and hence it is used in fire detector and the fire extinguishers. It also used in electric solders and fuses.
- Currently known uses of Neptunium metal are limited to research purpose only.
- Neptunium’s isotope neptunium-237 is used as a neutron detectors.
Industrial Uses
Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
NA
Medical Uses
Pharmaceutical Industry
NA
Other Uses
Alloys
Alloys, Nuclear Research, Research Purposes
Biological Properties
Toxicity
Low Toxic
Toxic
Present in Human Body
Yes
No
In Blood
0.02 Blood/mg dm-3
20
0.00 Blood/mg dm-3
37
In Bone
0.20 p.p.m.
22
0.00 p.p.m.
36
Physical Properties
Melting Point
271.30 °C
99+
640.00 °C
99+
Boiling Point
1,560.00 °C
99+
3,902.00 °C
13
Appearance
Physical State
Solid
Solid
Color
Silver
Silver
Luster
Metallic
Metallic
Hardness
Mohs Hardness
2.25
15
Not Available
Brinell Hardness
70.00 MPa
99+
Not Available
Speed of Sound
1,790.00 m/s
99+
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
Bi
Np
Isotopes
Known Isotopes
33
6
20
19
Electronegativity
Pauling Electronegativity
2.02
6
1.36
29
Sanderson Electronegativity
2.34
3
Not Available
Allred Rochow Electronegativity
1.67
6
1.22
26
Mulliken-Jaffe Electronegativity
2.15
4
Not Available
Allen Electronegativity
2.01
4
Not Available
Electropositivity
Pauling Electropositivity
1.98
99+
2.64
25
Ionization Energies
1st Energy Level
703.00 kJ/mol
35
604.50 kJ/mol
99+
2nd Energy Level
1,610.00 kJ/mol
33
1,128.00 kJ/mol
99+
3rd Energy Level
2,466.00 kJ/mol
99+
1,997.00 kJ/mol
99+
4th Energy Level
4,370.00 kJ/mol
28
3,242.00 kJ/mol
99+
5th Energy Level
5,400.00 kJ/mol
30
Not Available
6th Energy Level
8,520.00 kJ/mol
19
Not Available
Electrochemical Equivalent
2.60 g/amp-hr
19
1.77 g/amp-hr
39
Electron Work Function
4.22 eV
22
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
83
33
93
25
Electron Configuration
[Xe] 4f14 5d10 6s2 6p3
[Rn] 5f4 6d1 7s2
Crystal Structure
Rhombohedral (RHO)
Orthorhombic (ORTH)
Crystal Lattice
RHO-Crystal-Structure-of-Bismuth.jpg#100
ORTH-Crystal-Structure-of-Neptunium.jpg#100
Atom
Number of Protons
83
33
93
25
Number of Neutrons
126
18
144
14
Number of Electrons
83
33
93
25
Radius of an Atom
Atomic Radius
156.00 pm
29
155.00 pm
30
Covalent Radius
148.00 pm
36
190.00 pm
18
Van der Waals Radius
207.00 pm
26
221.00 pm
22
Atomic Weight
208.98 amu
29
237.00 amu
22
Atomic Volume
21.30 cm3/mol
14
11.62 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
41.90 (-eV)
99+
96.00 (-eV)
9
Lattice Constant
667.40 pm
2
666.30 pm
3
Lattice Angles
NA
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
9.78 g/cm3
39
19.38 g/cm3
14
Density When Liquid (at m.p.)
10.05 g/cm3
18
Not Available
Tensile Strength
Not Available
125.00 MPa
14
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 2000 K
Not Available
0.11 (Pa)
17
Elasticity properties
Shear Modulus
12.00 GPa
99+
Not Available
Bulk Modulus
31.00 GPa
38
Not Available
Young's Modulus
32.00 GPa
99+
Not Available
Poisson Ratio
0.33
11
Not Available
Other Mechanical Properties
NA
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
9.79
30
20.25
6
Magnetic Ordering
Diamagnetic
Paramagnetic
Permeability
0.00 H/m
6
Not Available
Susceptibility
0.00
6
Not Available
Electrical Properties
Electrical Property
Semiconductor
Conductor
Resistivity
1.29 nΩ·m
99+
1.22 nΩ·m
99+
Electrical Conductivity
0.01 106/cm Ω
99+
0.01 106/cm Ω
99+
Electron Affinity
91.20 kJ/mol
11
Not Available
Thermal Properties
Specific Heat
0.12 J/(kg K)
40
0.12 J/(kg K)
40
Molar Heat Capacity
25.52 J/mol·K
37
29.46 J/mol·K
8
Thermal Conductivity
7.97 W/m·K
99+
6.30 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
13.40 µm/(m·K)
28
Not Available
Enthalpy
Enthalpy of Vaporization
151.00 kJ/mol
99+
Not Available
Enthalpy of Fusion
10.90 kJ/mol
33
3.20 kJ/mol
99+
Enthalpy of Atomization
207.10 kJ/mol
99+
Not Available
Standard Molar Entropy
56.70 J/mol.K
24
Not Available
|
||
|
||
|
