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Periodic Table Element Comparison: Compare Elements - Neptunium vs Californium

Compare Neptunium and Californium

Compare Neptunium and Californium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Neptunium vs Californium with most reliable information about their properties, attributes, facts, uses etc. You can compare Np vs Cf on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.

Facts

Neptunium
93
Np
237
Solid
Silver
actinide
N/A
 
7
f
[Rn] 5f4 6d1 7s2
644 °C
4×103 °C
2, 8, 18, 32, 22, 9, 2
CAS7439-99-8
Neighborhood Elements of Neptunium
Californium
98
Cf
251
Solid
N/A
actinide
N/A
 
7
f
[Rn] 5f10 7s2
900 °C
N/A
2, 8, 18, 32, 28, 8, 2
CAS7440-71-3
Neighborhood Elements of Californium

History

History
The element Neptunium was discovered by Edwin McMillan in year 1940 in United States. Neptunium derived its name from from Neptune, the eighth planet in the Solar System
The element Californium was discovered by Lawrence Berkeley National Laboratory in year 1950 in United States. Californium derived its name derived its name from from California, where the element was first synthesized

Presence: Abundance in Nature and Around Us

Ppb by weight (1ppb =10^-7 %)
N/A
None
None
None
None
None
N/A
None
None
None
None
None

Crystal Structure and Atomic Structure

175 pm
11.58924205379 cm3
N/A
N/A
180
neptunium Spectrum
666.3, 472.3, 488.7 pm
π/2, π/2, π/2
Pnma
62

Simple Orthorhombic

neptunium Crystal Structure
N/A
16.622516556291 cm3
N/A
N/A
2.9×103
californium Spectrum
338, 338, 1102.5 pm
π/2, π/2, 2 π/3
P63/mmc
194

Simple Hexagonal

californium Crystal Structure

Atomic and Orbital Properties

Atomic Number
Number of Electrons (with no charge)
Number of Protons
Mass Number
Number of Neutrons
Shell structure (Electrons per energy level)
Electron Configuration
Valence Electrons
Oxidation State
Atomic Term Symbol (Quantum Numbers)
Shell structure
93
93
93
237
144
2, 8, 18, 32, 22, 9, 2
[Rn] 5f4 6d1 7s2
5f4 6d1 7s2
 2;3;4;5;6;7
6L11/2
neptunium Shells
98
98
98
251
153
2, 8, 18, 32, 28, 8, 2
[Rn] 5f10 7s2
5f10 7s2
 2;3;4
5I8
californium Shells

Isotopes - Nuclear Properties

Isotopes
Naturally occurring stable isotopes:
None.
Naturally occurring stable isotopes:
None.

Chemical Properties: Ionization Energies and electron affinity

6
1.36
N/A
604.5 kJ/mol
4
1.3
N/A
608 kJ/mol

Physical Properties

20.45 g/cm3
11.58924205379

 

N/A
N/A
N/A
N/A


 

N/A
N/A
N/A

 

8.3×105 S/m
1.2×10-6 m Ω
N/A

 

6 W/(m K)
N/A

 

N/A
N/A
N/A
N/A
N/A

 

N/A

 

N/A
15.1 g/cm3
16.622516556291

 

N/A
N/A
N/A
N/A


 

N/A
N/A
N/A

 

N/A
N/A
N/A

 

N/A
N/A

 

N/A
N/A
N/A
N/A
N/A

 

N/A

 

N/A

Thermal Properties - Enthalpies and thermodynamics

644 °C
4×103 °C
N/A
N/A

 

10 kJ/mol
335 kJ/mol
N/A
900 °C
N/A
N/A
N/A

 

N/A
N/A
N/A

Regulatory and Health - Health and Safety Parameters and Guidelines

CAS7439-99-8
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A
CAS7440-71-3
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A

 

N/A
N/A