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Yttrium vs Neptunium

Yttrium
Neptunium
Neptunium vs Yttrium


Periodic Table
Symbol
Y  
Np  
Group Number
3  
15
Not Available  
Period Number
5  
7  
Block
d block  
f block  
Element Family
Transition Metal  
Actinide  
CAS Number
7440655  
25
7439998  
99+
Space Group Name
P63/mmc  
Pnma  
Space Group Number
194.00  
5
62.00  
11
Facts
Interesting Facts
  • Yttrium Metal is highly toxic.
  • Yttrium Metal is highly reactive in nature hence not found free in nature.
  
Not Available  
Sources
Found in Minerals, Mining, Ores of Minerals  
Made by Bombarding Uranium with Neutrons, Ores of metals  
History
  
  
Who Discovered
Johan Gadolin  
Edwin McMillan and Philip H. Abelson  
Discovery
In 1794  
In 1940  
Abundance
  
  
Abundance In Universe
7 * 10-7 %  
17
Not Available  
Abundance In Sun
~0.0000001 %  
26
~-9999 %  
Abundance In Meteorites
0.00 %  
21
Not Available  
Abundance In Earth's Crust
0.00 %  
22
Not Available  
Abundance In Oceans
0.00 %  
25
Not Available  
Uses
Uses & Benefits
  • Yttrium metal is used in different alloys, as it increases the strength of aluminum Magnesium alloy. It is used for radar microwave filter.
  • It is also used as a catalyst in ethene polymerisation.
  
  • 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
Electrical Industry, Electronic Industry  
NA  
Medical Uses
NA  
NA  
Other Uses
Alloys  
Alloys, Nuclear Research, Research Purposes  
Biological Properties
  
  
Toxicity
Highly Toxic  
Toxic  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
26
0.00 Blood/mg dm-3  
37
In Bone
0.07 p.p.m.  
25
0.00 p.p.m.  
36
Physical Properties
Melting Point
1,523.00 °C  
27
640.00 °C  
99+
Boiling Point
3,337.00 °C  
21
3,902.00 °C  
13
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silver  
Luster
NA  
Metallic  
Hardness
  
  
Brinell Hardness
589.00 MPa  
22
Not Available  
Speed of Sound
3,300.00 m/s  
23
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
Y  
Np  
Isotopes
  
  
Known Isotopes
19  
20
20  
19
Electronegativity
  
  
Pauling Electronegativity
1.22  
38
1.36  
29
Sanderson Electronegativity
0.65  
29
Not Available  
Allred Rochow Electronegativity
1.11  
29
1.22  
26
Allen Electronegativity
1.12  
38
Not Available  
Electropositivity
  
  
Pauling Electropositivity
2.78  
16
2.64  
25
Ionization Energies
  
  
1st Energy Level
600.00 kJ/mol  
99+
604.50 kJ/mol  
99+
2nd Energy Level
1,180.00 kJ/mol  
99+
1,128.00 kJ/mol  
99+
3rd Energy Level
1,980.00 kJ/mol  
99+
1,997.00 kJ/mol  
99+
4th Energy Level
5,847.00 kJ/mol  
10
3,242.00 kJ/mol  
99+
5th Energy Level
7,430.00 kJ/mol  
14
Not Available  
6th Energy Level
8,970.00 kJ/mol  
17
Not Available  
7th Energy level
11,190.00 kJ/mol  
18
Not Available  
8th Energy Level
12,450.00 kJ/mol  
18
Not Available  
9th Energy Level
14,110.00 kJ/mol  
19
Not Available  
10th Energy Level
18,400.00 kJ/mol  
17
Not Available  
11th Energy Level
19,900.00 kJ/mol  
18
Not Available  
12th Energy Level
36,090.00 kJ/mol  
5
Not Available  
Electrochemical Equivalent
1.11 g/amp-hr  
99+
1.77 g/amp-hr  
39
Electron Work Function
3.10 eV  
35
Not Available  
Other Chemical Properties
Chemical Stability, Flammable, Ionization, Radioactive Isotopes, Solubility  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic Properties
Atomic Number
39  
99+
93  
25
Electron Configuration
[Kr] 4d1 5s2  
[Rn] 5f4 6d1 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Orthorhombic (ORTH)  
Crystal Lattice
HCP-Crystal-Structure-of-Yttrium.jpg#100  
ORTH-Crystal-Structure-of-Neptunium.jpg#100  
Atom
  
  
Number of Protons
39  
99+
93  
25
Number of Neutrons
50  
99+
144  
14
Number of Electrons
39  
99+
93  
25
Radius of an Atom
  
  
Atomic Radius
180.00 pm  
14
155.00 pm  
30
Covalent Radius
190.00 pm  
18
190.00 pm  
18
Van der Waals Radius
200.00 pm  
28
221.00 pm  
22
Atomic Weight
88.91 amu  
99+
237.00 amu  
22
Atomic Volume
19.80 cm3/mol  
21
11.62 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Strontium
  
Uranium
  
Next Element
Zirconium
  
Plutonium
  
Valence Electron Potential
48.00 (-eV)  
30
96.00 (-eV)  
9
Lattice Constant
364.74 pm  
31
666.30 pm  
3
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
16
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
4.47 g/cm3  
99+
19.38 g/cm3  
14
Density When Liquid (at m.p.)
4.24 g/cm3  
99+
Not Available  
Tensile Strength
Not Available  
125.00 MPa  
14
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
32
Not Available  
Vapor Pressure at 2000 K
4.27 (Pa)  
10
0.11 (Pa)  
17
Elasticity properties
  
  
Shear Modulus
25.60 GPa  
30
Not Available  
Bulk Modulus
41.20 GPa  
30
Not Available  
Young's Modulus
63.50 GPa  
32
Not Available  
Poisson Ratio
0.24  
26
Not Available  
Other Mechanical Properties
Ductile  
Ductile  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
4.47  
99+
20.25  
6
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
596.00 nΩ·m  
8
1.22 nΩ·m  
99+
Electrical Conductivity
0.02 106/cm Ω  
99+
0.01 106/cm Ω  
99+
Electron Affinity
29.60 kJ/mol  
30
Not Available  
Thermal Properties
Specific Heat
0.30 J/(kg K)  
18
0.12 J/(kg K)  
40
Molar Heat Capacity
26.53 J/mol·K  
27
29.46 J/mol·K  
8
Thermal Conductivity
17.20 W/m·K  
99+
6.30 W/m·K  
99+
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
10.60 µm/(m·K)  
37
Not Available  
Enthalpy
  
  
Enthalpy of Vaporization
393.00 kJ/mol  
18
Not Available  
Enthalpy of Fusion
17.15 kJ/mol  
16
3.20 kJ/mol  
99+
Enthalpy of Atomization
418.00 kJ/mol  
18
Not Available  
Standard Molar Entropy
44.40 J/mol.K  
33
Not Available  
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