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Strontium vs Zinc

Strontium
Zinc
Zinc vs Strontium


Periodic Table
Symbol
Sr  
Zn  
Group Number
2  
16
12  
6
Period Number
5  
4  
Block
s block  
d block  
Element Family
Alkaline Earth  
Transition Metal  
CAS Number
7440246  
99+
7440666  
24
Space Group Name
Fm_ 3m  
P63/mmc  
Space Group Number
225.00  
2
194.00  
5
Facts
Interesting Facts
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
  
  • Zinc metal found (obtain) in many forms like granules, foil, dust and in a powder form.
  • The leading producers of Zinc metal are Australia, Canada, China, U.S.A and Peru.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
William Cruickshank  
Indian metallurgists  
Discovery
In 1787  
Before 1000 BCE  
Abundance
  
  
Abundance In Universe
4 * 10-6 %  
14
3 * 10-5 %  
11
Abundance In Sun
~0.000005 %  
15
~0.0002 %  
10
Abundance In Meteorites
0.00 %  
15
0.02 %  
12
Abundance In Earth's Crust
0.04 %  
10
0.01 %  
16
Abundance In Oceans
0.00 %  
4
0.00 %  
10
Abundance In Humans
0.00 %  
7
0.00 %  
6
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.
  
  • It is mainly used for Galvanizing other metals.
  • It is also used for manufacturing die-casting and it is very essential for automobile industry.
  
Industrial Uses
Ammunition Industry, Chemical Industry  
Electrical Industry, Electronic Industry  
Medical Uses
NA  
Pharmaceutical Industry  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Highly Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.03 Blood/mg dm-3  
19
7.00 Blood/mg dm-3  
6
In Bone
140.00 p.p.m.  
7
170.00 p.p.m.  
6
Physical Properties
Melting Point
769.00 °C  
99+
419.58 °C  
99+
Boiling Point
1,384.00 °C  
99+
907.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
1.50  
18
2.50  
14
Brinell Hardness
Not Available  
327.00 MPa  
32
Speed of Sound
Not Available  
3,850.00 m/s  
18
Optical Properties
  
  
Refractive Index
Not Available  
1.00  
2
Reflectivity
Not Available  
80.00 %  
5
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
Sr  
Zn  
Isotopes
  
  
Known Isotopes
27  
12
25  
14
Electronegativity
  
  
Pauling Electronegativity
0.95  
99+
1.65  
19
Sanderson Electronegativity
0.72  
27
2.23  
6
Allred Rochow Electronegativity
0.99  
37
1.66  
7
Mulliken-Jaffe Electronegativity
1.00  
18
1.65  
11
Allen Electronegativity
0.96  
40
1.59  
22
Electropositivity
  
  
Pauling Electropositivity
3.05  
7
2.35  
35
Ionization Energies
  
  
1st Energy Level
549.50 kJ/mol  
99+
906.40 kJ/mol  
6
2nd Energy Level
1,064.20 kJ/mol  
99+
1,733.30 kJ/mol  
27
3rd Energy Level
4,138.00 kJ/mol  
10
3,833.00 kJ/mol  
12
4th Energy Level
5,500.00 kJ/mol  
13
5,731.00 kJ/mol  
11
5th Energy Level
6,910.00 kJ/mol  
18
7,970.00 kJ/mol  
9
6th Energy Level
8,760.00 kJ/mol  
18
10,400.00 kJ/mol  
9
7th Energy level
10,230.00 kJ/mol  
19
12,900.00 kJ/mol  
9
8th Energy Level
11,800.00 kJ/mol  
19
16,800.00 kJ/mol  
6
9th Energy Level
15,600.00 kJ/mol  
17
19,600.00 kJ/mol  
8
10th Energy Level
17,100.00 kJ/mol  
19
23,000.00 kJ/mol  
10
11th Energy Level
31,270.00 kJ/mol  
6
26,400.00 kJ/mol  
11
12th Energy Level
Not Available  
29,990.00 kJ/mol  
11
13th Energy Level
Not Available  
40,490.00 kJ/mol  
5
14th Energy Level
Not Available  
43,800.00 kJ/mol  
6
15th Energy Level
Not Available  
47,300.00 kJ/mol  
8
16th Energy Level
Not Available  
52,300.00 kJ/mol  
9
17th Energy Level
Not Available  
55,900.00 kJ/mol  
10
18th Energy Level
Not Available  
59,700.00 kJ/mol  
11
19th Energy Level
Not Available  
67,300.00 kJ/mol  
10
20th Energy Level
Not Available  
171,200.00 kJ/mol  
1
21st Energy Level
Not Available  
179,100.00 kJ/mol  
1
Electrochemical Equivalent
1.64 g/amp-hr  
99+
1.22 g/amp-hr  
99+
Electron Work Function
2.59 eV  
99+
4.33 eV  
17
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes  
Atomic Properties
Atomic Number
38  
99+
30  
99+
Electron Configuration
[Kr] 5s2  
[Ar] 3d10 4s2  
Crystal Structure
Face Centered Cubic (FCC)  
Hexagonal Close Packed (HCP)  
Crystal Lattice
FCC-Crystal-Structure-of-Strontium.jpg#100  
HCP-Crystal-Structure-of-Zinc.jpg#100  
Atom
  
  
Number of Protons
38  
99+
30  
99+
Number of Neutrons
50  
99+
35  
99+
Number of Electrons
38  
99+
30  
99+
Radius of an Atom
  
  
Atomic Radius
215.00 pm  
5
134.00 pm  
99+
Covalent Radius
195.00 pm  
15
122.00 pm  
99+
Van der Waals Radius
249.00 pm  
7
139.00 pm  
99+
Atomic Weight
87.62 amu  
99+
65.38 amu  
99+
Atomic Volume
33.70 cm3/mol  
6
9.20 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rubidium
  
Copper
  
Next Element
Yttrium
  
Gallium
  
Valence Electron Potential
25.70 (-eV)  
99+
38.90 (-eV)  
99+
Lattice Constant
608.49 pm  
6
266.49 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, 2 π/3  
Lattice C/A Ratio
Not Available  
Not Available  
Mechanical Properties
Density
  
  
Density At Room Temperature
2.64 g/cm3  
99+
7.14 g/cm3  
99+
Density When Liquid (at m.p.)
2.38 g/cm3  
99+
6.57 g/cm3  
37
Tensile Strength
Not Available  
Not Available  
Viscosity
Not Available  
Not Available  
Vapor Pressure
  
  
Vapor Pressure at 1000 K
121.00 (Pa)  
1
Not Available  
Elasticity properties
  
  
Shear Modulus
6.03 GPa  
99+
43.00 GPa  
18
Bulk Modulus
Not Available  
70.00 GPa  
19
Young's Modulus
15.70 GPa  
99+
108.00 GPa  
19
Poisson Ratio
0.28  
17
0.25  
24
Other Mechanical Properties
NA  
NA  
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
2.64  
99+
6.90  
99+
Magnetic Ordering
Paramagnetic  
Diamagnetic  
Electrical Properties
  
  
Electrical Property
NA  
Conductor  
Resistivity
132.00 nΩ·m  
24
59.00 nΩ·m  
40
Electrical Conductivity
0.08 106/cm Ω  
26
0.17 106/cm Ω  
12
Electron Affinity
5.03 kJ/mol  
38
0.00 kJ/mol  
40
Thermal Properties
Specific Heat
0.30 J/(kg K)  
18
0.39 J/(kg K)  
14
Molar Heat Capacity
26.40 J/mol·K  
28
25.47 J/mol·K  
39
Thermal Conductivity
35.40 W/m·K  
37
116.00 W/m·K  
14
Critical Temperature
Not Available  
Not Available  
Thermal Expansion
22.50 µm/(m·K)  
18
30.20 µm/(m·K)  
11
Enthalpy
  
  
Enthalpy of Vaporization
150.00 kJ/mol  
99+
7.32 kJ/mol  
99+
Enthalpy of Fusion
9.16 kJ/mol  
38
7.32 kJ/mol  
99+
Enthalpy of Atomization
163.20 kJ/mol  
99+
129.70 kJ/mol  
99+
Standard Molar Entropy
55.00 J/mol.K  
26
41.60 J/mol.K  
36
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