Flerovium Neptunium Comparison
Periodic Table
Symbol
Fl
Np
Group Number
14
4
Not Available
Period Number
7
7
Block
p block
f block
Element Family
Post-Transition
Actinide
CAS Number
54085164
5
7439998
99+
Space Group Name
Not Available
Pnma
Space Group Number
Not Available
62.00
11
Facts
Interesting Facts
Not Available
Not Available
Sources
NA
Made by Bombarding Uranium with Neutrons, Ores of metals
History
Who Discovered
Joint Institute for Nuclear Research and Lawrence Livermore National Laboratory
Edwin McMillan and Philip H. Abelson
Discovery
In 1999
In 1940
Abundance
Uses
Uses & Benefits
- Currently known uses of Flerovium metal are limited to research purpose only.
- 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
NA
NA
Medical Uses
NA
NA
Other Uses
Alloys, Research Purposes
Alloys, Nuclear Research, Research Purposes
Biological Properties
Toxicity
Unknown
Toxic
Present in Human Body
No
No
In Blood
Not Available
0.00 Blood/mg dm-3
37
In Bone
Not Available
0.00 p.p.m.
36
Physical Properties
Melting Point
67.00 °C
99+
640.00 °C
99+
Boiling Point
147.00 °C
99+
3,902.00 °C
13
Appearance
Physical State
Solid
Solid
Color
Unknown
Silver
Luster
Unknown Luster
Metallic
Hardness
Speed of Sound
Not Available
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
Fl
Np
Isotopes
Known Isotopes
1
34
20
19
Electronegativity
Pauling Electronegativity
Not Available
1.36
29
Allred Rochow Electronegativity
Not Available
1.22
26
Electropositivity
Pauling Electropositivity
Not Available
2.64
25
Ionization Energies
1st Energy Level
823.90 kJ/mol
13
604.50 kJ/mol
99+
2nd Energy Level
1,601.60 kJ/mol
34
1,128.00 kJ/mol
99+
3rd Energy Level
3,367.30 kJ/mol
18
1,997.00 kJ/mol
99+
4th Energy Level
4,399.70 kJ/mol
27
3,242.00 kJ/mol
99+
5th Energy Level
5,847.00 kJ/mol
26
Not Available
Electrochemical Equivalent
Not Available
1.77 g/amp-hr
39
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
114
4
93
25
Electron Configuration
[Rn] 5f14 6d10 7s2 7p2
[Rn] 5f4 6d1 7s2
Crystal Structure
Not Known
Orthorhombic (ORTH)
Crystal Lattice
Unknown-Crystal-Structure-of-Flerovium.jpg#100
ORTH-Crystal-Structure-of-Neptunium.jpg#100
Atom
Number of Protons
114
4
93
25
Number of Neutrons
184
1
144
14
Number of Electrons
114
4
93
25
Radius of an Atom
Atomic Radius
180.00 pm
14
155.00 pm
30
Covalent Radius
171.00 pm
24
190.00 pm
18
Van der Waals Radius
Not Available
221.00 pm
22
Atomic Weight
289.00 amu
3
237.00 amu
22
Atomic Volume
Not Available
11.62 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
Not Available
96.00 (-eV)
9
Lattice Constant
Not Available
666.30 pm
3
Lattice Angles
Unknown
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
14.00 g/cm3
23
19.38 g/cm3
14
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
Poisson Ratio
Not Available
Not Available
Other Mechanical Properties
NA
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
Not Available
20.25
6
Magnetic Ordering
Unknown
Paramagnetic
Electrical Properties
Electrical Property
Unknown
Conductor
Resistivity
Not Available
1.22 nΩ·m
99+
Electrical Conductivity
Not Available
0.01 106/cm Ω
99+
Thermal Properties
Specific Heat
Not Available
0.12 J/(kg K)
40
Molar Heat Capacity
Not Available
29.46 J/mol·K
8
Thermal Conductivity
Not Available
6.30 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
Not Available
Enthalpy
Enthalpy of Fusion
Not Available
3.20 kJ/mol
99+
Standard Molar Entropy
Not Available
Not Available
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