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Strontium vs Uranium

Strontium
Uranium
Uranium vs Strontium


Periodic Table
Symbol
Sr  
U  
Group Number
2  
16
0  
18
Period Number
5  
7  
Block
s block  
f block  
Element Family
Alkaline Earth  
Actinide  
CAS Number
7440246  
99+
7440611  
28
Space Group Name
Fm_ 3m  
Cmcm  
Space Group Number
225.00  
3
63.00  
13
Facts
Interesting Facts
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
  
  • Major mining countries of Uranium include Russia, Australia, Namibia, Canada and Niger and total 33% Uranium are mine in Kazakhstan.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Earth's crust, Mining, Ores of Minerals  
History
  
  
Who Discovered
William Cruickshank  
-  
Discovery
In 1787  
In 1789  
Abundance
  
  
Abundance In Universe
0.00 %  
15
0.00 %  
30
Abundance In Sun
0.00 %  
15
0.00 %  
26
Abundance In Meteorites
0.00 %  
15
0.00 %  
99+
Abundance In Earth's Crust
0.04 %  
10
0.00 %  
36
Abundance In Oceans
0.00 %  
4
0.00 %  
11
Abundance In Humans
0.00 %  
8
0.00 %  
24
Uses
Uses & Benefits
  • Strontium metal is used to producing ferrite magnets as well as refining zinc.
  • By-product of nuclear reactors called Strontium-90 is a radioactive isotope; it is absorbed by tissues and destroys bone marrow and cancer growth.
  
  • The main use of this metal include nuclear fuel which is used to generate electricity yin nuclear power stations.
  • Synthetic elements like transuranium are made from Uranium metal.
  
Industrial Uses
Ammunition Industry, Chemical Industry  
Ammunition Industry, Chemical Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys, Jewellery, Nuclear Reactor's Fuel, Sculptures, Statues  
Biological Properties
  
  
Toxicity
Non Toxic  
Toxic  
Present in Human Body
Yes  
No  
In Blood
0.03 Blood/mg dm-3  
19
0.00 Blood/mg dm-3  
37
In Bone
140.00 p.p.m.  
7
1.20 p.p.m.  
19
Physical
Melting Point
769.00 °C  
99+
1,132.00 °C  
39
Boiling Point
1,384.00 °C  
99+
3,818.00 °C  
16
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
1.50  
19
6.00  
6
Brinell Hardness
110.00 MPa  
99+
2,350.00 MPa  
2
Vickers Hardness
15.00 MPa  
99+
1,960.00 MPa  
6
Speed of Sound
4,170.00 m/s  
23
3,155.00 m/s  
36
Optical Properties
  
  
Refractive Index
1.43  
39
1.38  
40
Reflectivity
65.00 %  
18
80.00 %  
7
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Sr  
U  
Isotopes
  
  
Known Isotopes
27  
12
25  
14
Electronegativity
  
  
Pauling Electronegativity
0.95  
99+
1.38  
29
Sanderson Electronegativity
0.72  
99+
1.38  
22
Allred Rochow Electronegativity
0.99  
38
1.22  
27
Mulliken-Jaffe Electronegativity
1.00  
99+
1.38  
29
Allen Electronegativity
0.96  
99+
1.38  
36
Electropositivity
  
  
Pauling Electropositivity
3.05  
7
2.62  
26
Ionization Energies
  
  
1st Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
2nd Energy Level
1,064.20 kJ/mol  
99+
1,420.00 kJ/mol  
99+
3rd Energy Level
4,138.00 kJ/mol  
10
1,900.00 kJ/mol  
99+
4th Energy Level
5,500.00 kJ/mol  
22
3,145.00 kJ/mol  
99+
5th Energy Level
6,910.00 kJ/mol  
30
5,976.00 kJ/mol  
99+
6th Energy Level
8,760.00 kJ/mol  
26
5,976.00 kJ/mol  
99+
7th Energy level
10,230.00 kJ/mol  
19
5,970.00 kJ/mol  
99+
8th Energy Level
11,800.00 kJ/mol  
19
5,976.00 kJ/mol  
99+
9th Energy Level
15,600.00 kJ/mol  
17
5,976.00 kJ/mol  
99+
10th Energy Level
17,100.00 kJ/mol  
19
5,976.00 kJ/mol  
99+
11th Energy Level
31,270.00 kJ/mol  
6
5,976.00 kJ/mol  
99+
12th Energy Level
5,490.00 kJ/mol  
99+
5,970.00 kJ/mol  
99+
13th Energy Level
5,490.00 kJ/mol  
99+
5,970.00 kJ/mol  
99+
14th Energy Level
5,490.00 kJ/mol  
99+
5,970.00 kJ/mol  
34
15th Energy Level
54,900.00 kJ/mol  
99+
59,700.00 kJ/mol  
99+
16th Energy Level
54,900.00 kJ/mol  
99+
59,700.00 kJ/mol  
35
17th Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
18th Energy Level
5,490.00 kJ/mol  
99+
5,976.00 kJ/mol  
99+
19th Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
20th Energy Level
549.00 kJ/mol  
99+
597.00 kJ/mol  
99+
21st Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
22nd Energy Level
549.00 kJ/mol  
99+
597.00 kJ/mol  
99+
23rd Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
24th Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
25th Energy Level
549.00 kJ/mol  
99+
597.60 kJ/mol  
99+
26th Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
27th Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
28th Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
29th Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
30th Energy Level
549.50 kJ/mol  
99+
597.60 kJ/mol  
99+
Electrochemical Equivalent
1.64 g/amp-hr  
99+
1.48 g/amp-hr  
99+
Electron Work Function
2.59 eV  
99+
3.63 eV  
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
38  
99+
92  
26
Electron Configuration
[Kr] 5s2  
[Rn] 5f3 6d1 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Orthorhombic (ORTH)  
Crystal Lattice
FCC-Crystal-Structure-of-Strontium.jpg#100  
ORTH-Crystal-Structure-of-Uranium.jpg#100  
Atom
  
  
Number of Protons
38  
99+
92  
26
Number of Neutrons
50  
99+
146  
14
Number of Electrons
38  
99+
92  
26
Radius of an Atom
  
  
Atomic Radius
215.00 pm  
6
156.00 pm  
31
Covalent Radius
195.00 pm  
15
196.00 pm  
14
Van der Waals Radius
249.00 pm  
11
186.00 pm  
40
Atomic Weight
87.62 amu  
99+
238.03 amu  
21
Atomic Volume
33.70 cm3/mol  
9
12.59 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rubidium
  
Protactinium
  
Next Element
Yttrium
  
Neptunium
  
Valence Electron Potential
25.70 (-eV)  
99+
170.00 (-eV)  
4
Lattice Constant
608.49 pm  
6
295.08 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
40
1.02  
99+
Mechanical
Density
  
  
Density At Room Temperature
2.64 g/cm3  
99+
19.10 g/cm3  
17
Density When Liquid (at m.p.)
2.38 g/cm3  
99+
17.30 g/cm3  
17
Tensile Strength
170.00 MPa  
21
100.00 MPa  
28
Viscosity
0.00  
2
0.00  
21
Vapor Pressure
  
  
Vapor Pressure at 1000 K
121.00 (Pa)  
1
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
38
0.01 (Pa)  
20
Elasticity properties
  
  
Shear Modulus
6.03 GPa  
99+
111.00 GPa  
10
Bulk Modulus
11.00 GPa  
99+
100.00 GPa  
16
Young's Modulus
15.70 GPa  
99+
208.00 GPa  
11
Poisson Ratio
0.28  
17
0.23  
30
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
2.64  
99+
18.80  
19
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
16
Susceptibility
0.00  
35
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
Poor Conductor  
Resistivity
132.00 nΩ·m  
24
0.28 nΩ·m  
99+
Electrical Conductivity
0.08 106/cm Ω  
31
0.04 106/cm Ω  
99+
Electron Affinity
5.03 kJ/mol  
99+
50.60 kJ/mol  
25
Thermal
Specific Heat
0.30 J/(kg K)  
18
0.12 J/(kg K)  
99+
Molar Heat Capacity
26.40 J/mol·K  
36
27.67 J/mol·K  
18
Thermal Conductivity
35.40 W/m·K  
38
27.50 W/m·K  
99+
Critical Temperature
1,050.00 K  
99+
1,405.00 K  
99+
Thermal Expansion
22.50 µm/(m·K)  
19
13.90 µm/(m·K)  
30
Enthalpy
  
  
Enthalpy of Vaporization
150.00 kJ/mol  
99+
477.00 kJ/mol  
18
Enthalpy of Fusion
9.16 kJ/mol  
99+
15.48 kJ/mol  
19
Enthalpy of Atomization
163.20 kJ/mol  
99+
489.50 kJ/mol  
18
Standard Molar Entropy
55.00 J/mol.K  
34
50.20 J/mol.K  
99+
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