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Tungsten vs Strontium

Tungsten
Strontium
Strontium vs Tungsten


Periodic Table
Symbol
W  
Sr  
Group Number
6  
12
2  
16
Period Number
6  
5  
Block
d block  
s block  
Element Family
Transition Metal  
Alkaline Earth  
CAS Number
7440337  
99+
7440246  
99+
Space Group Name
Im_ 3m  
Fm_ 3m  
Space Group Number
229.00  
2
225.00  
3
Facts
Interesting Facts
  • Tungsten element has the second highest melting point.
  • Pure tungsten can easily cut down with the help of hacksaw.
  
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
  
Sources
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
-  
William Cruickshank  
Discovery
In 1781  
In 1787  
Abundance
  
  
Abundance In Universe
0.00 %  
28
0.00 %  
15
Abundance In Sun
0.00 %  
23
0.00 %  
15
Abundance In Meteorites
0.00 %  
39
0.00 %  
15
Abundance In Earth's Crust
0.00 %  
39
0.04 %  
10
Abundance In Oceans
0.00 %  
18
0.00 %  
4
Abundance In Humans
0.00 %  
24
0.00 %  
8
Uses
Uses & Benefits
  • Tungsten and its alloys are used in high-temperature applications like welding electrodes, high-temperature furnace, etc.
  • Tungsten carbide is very hard and used in metal working, mining and petroleum industry.
  
  • 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.
  
Industrial Uses
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Ammunition Industry, Chemical Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Non Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.00 Blood/mg dm-3  
31
0.03 Blood/mg dm-3  
19
In Bone
0.00 p.p.m.  
40
140.00 p.p.m.  
7
Physical
Melting Point
3,410.00 °C  
1
769.00 °C  
99+
Boiling Point
5,660.00 °C  
1
1,384.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Grayish White  
Silvery White  
Luster
Lustrous  
Metallic  
Hardness
  
  
Mohs Hardness
7.50  
2
1.50  
19
Brinell Hardness
2,000.00 MPa  
4
110.00 MPa  
99+
Vickers Hardness
3,430.00 MPa  
3
15.00 MPa  
99+
Speed of Sound
4,620.00 m/s  
20
4,170.00 m/s  
23
Optical Properties
  
  
Refractive Index
2.10  
11
1.43  
39
Reflectivity
62.00 %  
21
65.00 %  
18
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
W  
Sr  
Isotopes
  
  
Known Isotopes
33  
6
27  
12
Electronegativity
  
  
Pauling Electronegativity
2.36  
3
0.95  
99+
Sanderson Electronegativity
0.98  
99+
0.72  
99+
Allred Rochow Electronegativity
1.40  
20
0.99  
38
Mulliken-Jaffe Electronegativity
2.36  
3
1.00  
99+
Allen Electronegativity
1.47  
33
0.96  
99+
Electropositivity
  
  
Pauling Electropositivity
1.64  
99+
3.05  
7
Ionization Energies
  
  
1st Energy Level
770.00 kJ/mol  
16
549.50 kJ/mol  
99+
2nd Energy Level
1,700.00 kJ/mol  
30
1,064.20 kJ/mol  
99+
3rd Energy Level
2,045.40 kJ/mol  
99+
4,138.00 kJ/mol  
10
4th Energy Level
7,700.00 kJ/mol  
8
5,500.00 kJ/mol  
22
5th Energy Level
7,700.00 kJ/mol  
17
6,910.00 kJ/mol  
30
6th Energy Level
7,700.00 kJ/mol  
35
8,760.00 kJ/mol  
26
7th Energy level
7,700.00 kJ/mol  
29
10,230.00 kJ/mol  
19
8th Energy Level
7,700.00 kJ/mol  
29
11,800.00 kJ/mol  
19
9th Energy Level
7,700.00 kJ/mol  
25
15,600.00 kJ/mol  
17
10th Energy Level
7,700.00 kJ/mol  
29
17,100.00 kJ/mol  
19
11th Energy Level
7,700.00 kJ/mol  
28
31,270.00 kJ/mol  
6
12th Energy Level
7,700.00 kJ/mol  
99+
5,490.00 kJ/mol  
99+
13th Energy Level
7,700.00 kJ/mol  
21
5,490.00 kJ/mol  
99+
14th Energy Level
770.00 kJ/mol  
99+
5,490.00 kJ/mol  
99+
15th Energy Level
77,000.00 kJ/mol  
18
54,900.00 kJ/mol  
99+
16th Energy Level
77,000.00 kJ/mol  
13
54,900.00 kJ/mol  
99+
17th Energy Level
770.00 kJ/mol  
34
549.50 kJ/mol  
99+
18th Energy Level
7,700.00 kJ/mol  
24
5,490.00 kJ/mol  
99+
19th Energy Level
770.00 kJ/mol  
31
549.50 kJ/mol  
99+
20th Energy Level
770.00 kJ/mol  
25
549.00 kJ/mol  
99+
21st Energy Level
770.00 kJ/mol  
99+
549.50 kJ/mol  
99+
22nd Energy Level
770.00 kJ/mol  
19
549.00 kJ/mol  
99+
23rd Energy Level
770.00 kJ/mol  
99+
549.50 kJ/mol  
99+
24th Energy Level
770.00 kJ/mol  
15
549.50 kJ/mol  
99+
25th Energy Level
770.00 kJ/mol  
14
549.00 kJ/mol  
99+
26th Energy Level
770.00 kJ/mol  
14
549.50 kJ/mol  
99+
27th Energy Level
770.00 kJ/mol  
13
549.50 kJ/mol  
99+
28th Energy Level
770.00 kJ/mol  
19
549.50 kJ/mol  
99+
29th Energy Level
770.00 kJ/mol  
19
549.50 kJ/mol  
99+
30th Energy Level
770.00 kJ/mol  
14
549.50 kJ/mol  
99+
Electrochemical Equivalent
1.14 g/amp-hr  
99+
1.64 g/amp-hr  
99+
Electron Work Function
4.55 eV  
18
2.59 eV  
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
74  
99+
38  
99+
Electron Configuration
[Xe] 4f14 5d4 6s2  
[Kr] 5s2  
Crystal Structure
Body Centered Cubic (BCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Strontium.jpg#100  
Atom
  
  
Number of Protons
74  
99+
38  
99+
Number of Neutrons
110  
28
50  
99+
Number of Electrons
74  
99+
38  
99+
Radius of an Atom
  
  
Atomic Radius
139.00 pm  
99+
215.00 pm  
6
Covalent Radius
162.00 pm  
31
195.00 pm  
15
Van der Waals Radius
200.00 pm  
35
249.00 pm  
11
Atomic Weight
183.84 amu  
37
87.62 amu  
99+
Atomic Volume
9.53 cm3/mol  
99+
33.70 cm3/mol  
9
Adjacent Atomic Numbers
  
  
Previous Element
Tantalum
  
Rubidium
  
Next Element
Rhenium
  
Yttrium
  
Valence Electron Potential
140.00 (-eV)  
5
25.70 (-eV)  
99+
Lattice Constant
316.52 pm  
99+
608.49 pm  
6
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.29  
99+
1.57  
40
Mechanical
Density
  
  
Density At Room Temperature
19.25 g/cm3  
16
2.64 g/cm3  
99+
Density When Liquid (at m.p.)
17.60 g/cm3  
15
2.38 g/cm3  
99+
Tensile Strength
370.00 MPa  
11
170.00 MPa  
21
Viscosity
0.00  
1
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
121.00 (Pa)  
1
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
0.00 (Pa)  
38
Elasticity properties
  
  
Shear Modulus
161.00 GPa  
5
6.03 GPa  
99+
Bulk Modulus
310.00 GPa  
4
11.00 GPa  
99+
Young's Modulus
411.00 GPa  
4
15.70 GPa  
99+
Poisson Ratio
0.28  
17
0.28  
17
Other Mechanical Properties
Ductile, Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
19.22  
18
2.64  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
17
Susceptibility
0.00  
23
0.00  
35
Electrical Properties
  
  
Electrical Property
Superconductor  
-  
Resistivity
52.80 nΩ·m  
99+
132.00 nΩ·m  
24
Electrical Conductivity
0.19 106/cm Ω  
10
0.08 106/cm Ω  
31
Electron Affinity
78.60 kJ/mol  
15
5.03 kJ/mol  
99+
Thermal
Specific Heat
0.13 J/(kg K)  
40
0.30 J/(kg K)  
18
Molar Heat Capacity
24.27 J/mol·K  
99+
26.40 J/mol·K  
36
Thermal Conductivity
173.00 W/m·K  
7
35.40 W/m·K  
38
Critical Temperature
3,695.00 K  
1
1,050.00 K  
99+
Thermal Expansion
4.50 µm/(m·K)  
99+
22.50 µm/(m·K)  
19
Enthalpy
  
  
Enthalpy of Vaporization
799.10 kJ/mol  
1
150.00 kJ/mol  
99+
Enthalpy of Fusion
35.23 kJ/mol  
1
9.16 kJ/mol  
99+
Enthalpy of Atomization
837.00 kJ/mol  
1
163.20 kJ/mol  
99+
Standard Molar Entropy
32.60 J/mol.K  
99+
55.00 J/mol.K  
34
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