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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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