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Strontium vs Aluminium

Strontium
Aluminium
Aluminium vs Strontium


Periodic Table
Symbol
Sr   
Al   
Group Number
2   
16
13   
5
Period Number
5   
3   
Block
s block   
p block   
Element Family
Alkaline Earth   
Post-​Transition   
CAS Number
7440246   
99+
7429905   
99+
Space Group Name
Fm_ 3m   
Fm_ 3m   
Space Group Number
225.00   
2
225.00   
2
Facts
Interesting Facts
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
  
  • Aluminum’s abundance percentage is more as it is found in more than 260 minerals.
  • Pure Aluminum always reacts with oxygen rapidly.
  • It is a good conductor of heat and electricity and used in transmission lines.
  
Sources
Found in Minerals, Mining, Ores of Minerals   
By Electrolysis Process, Earth's crust, Mining   
History
  
  
Who Discovered
William Cruickshank   
Hans Christian Oersted   
Discovery
In 1787   
In 1825   
Abundance
  
  
Abundance In Universe
4 * 10-6 %   
14
5 * 10-3 %   
5
Abundance In Sun
~0.000005 %   
15
~0.006 %   
5
Abundance In Meteorites
0.00 %   
15
0.91 %   
5
Abundance In Earth's Crust
0.04 %   
10
8.10 %   
1
Abundance In Oceans
0.00 %   
4
0.00 %   
6
Abundance In Humans
0.00 %   
7
0.00 %   
10
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.
  
  • Aluminum is used in a various products; for example, cans, foils, kitchen utensils, window frames, beer kegs and aero plane parts, automobile parts, etc.
  
Industrial Uses
Ammunition Industry, Chemical Industry   
Aerospace Industry, Ammunition Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
NA   
Dentistry, Pharmaceutical Industry, Surgical Instruments Manufacturing   
Other Uses
Alloys   
Alloys, Jewellery, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Non Toxic   
Non Toxic   
Present in Human Body
Yes   
Yes   
In Blood
0.03 Blood/mg dm-3   
19
0.39 Blood/mg dm-3   
9
In Bone
140.00 p.p.m.   
7
27.00 p.p.m.   
11
Physical Properties
Melting Point
769.00 °C   
99+
660.37 °C   
99+
Boiling Point
1,384.00 °C   
99+
2,467.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery Gray   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
1.50   
18
2.75   
13
Brinell Hardness
Not Available   
160.00 MPa   
99+
Vickers Hardness
Not Available   
160.00 MPa   
35
Speed of Sound
Not Available   
5,000.00 m/s   
10
Optical Properties
  
  
Reflectivity
Not Available   
71.00 %   
10
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   
Al   
Isotopes
  
  
Known Isotopes
27   
12
11   
27
Electronegativity
  
  
Pauling Electronegativity
0.95   
99+
1.61   
22
Sanderson Electronegativity
0.72   
27
1.71   
13
Allred Rochow Electronegativity
0.99   
37
1.47   
14
Mulliken-Jaffe Electronegativity
1.00   
18
1.83   
8
Allen Electronegativity
0.96   
40
1.61   
20
Electropositivity
  
  
Pauling Electropositivity
3.05   
7
2.39   
32
Ionization Energies
  
  
1st Energy Level
549.50 kJ/mol   
99+
577.50 kJ/mol   
99+
2nd Energy Level
1,064.20 kJ/mol   
99+
1,816.70 kJ/mol   
19
3rd Energy Level
4,138.00 kJ/mol   
10
2,744.80 kJ/mol   
38
4th Energy Level
5,500.00 kJ/mol   
13
11,577.00 kJ/mol   
3
5th Energy Level
6,910.00 kJ/mol   
18
14,842.00 kJ/mol   
2
6th Energy Level
8,760.00 kJ/mol   
18
18,379.00 kJ/mol   
2
7th Energy level
10,230.00 kJ/mol   
19
23,326.00 kJ/mol   
2
8th Energy Level
11,800.00 kJ/mol   
19
27,465.00 kJ/mol   
2
9th Energy Level
15,600.00 kJ/mol   
17
31,853.00 kJ/mol   
2
10th Energy Level
17,100.00 kJ/mol   
19
38,473.00 kJ/mol   
4
11th Energy Level
31,270.00 kJ/mol   
6
42,647.00 kJ/mol   
5
Electrochemical Equivalent
1.64 g/amp-hr   
99+
0.34 g/amp-hr   
99+
Electron Work Function
2.59 eV   
99+
4.28 eV   
19
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility   
Chemical Stability, Ionization, Radioactive Isotopes   
Atomic Properties
Atomic Number
38   
99+
13   
99+
Electron Configuration
[Kr] 5s2   
[Ne] 3s2 3p1   
Crystal Structure
Face Centered Cubic (FCC)   
Face Centered Cubic (FCC)   
Crystal Lattice
FCC-Crystal-Structure-of-Strontium.jpg#100   
FCC-Crystal-Structure-of-Aluminium.jpg#100   
Atom
  
  
Number of Protons
38   
99+
13   
99+
Number of Neutrons
50   
99+
14   
99+
Number of Electrons
38   
99+
13   
99+
Radius of an Atom
  
  
Atomic Radius
215.00 pm   
5
143.00 pm   
37
Covalent Radius
195.00 pm   
15
121.00 pm   
99+
Van der Waals Radius
249.00 pm   
7
184.00 pm   
34
Atomic Weight
87.62 amu   
99+
26.98 amu   
99+
Atomic Volume
33.70 cm3/mol   
6
10.00 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rubidium
  
Magnesium
  
Next Element
Yttrium
  
Potassium
  
Valence Electron Potential
25.70 (-eV)   
99+
80.70 (-eV)   
17
Lattice Constant
608.49 pm   
6
404.95 pm   
22
Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   
Lattice C/A Ratio
Not Available   
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
2.64 g/cm3   
99+
2.70 g/cm3   
99+
Density When Liquid (at m.p.)
2.38 g/cm3   
99+
2.38 g/cm3   
99+
Tensile Strength
Not Available   
40.00 MPa   
19
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
121.00 (Pa)   
1
0.00 (Pa)   
18
Elasticity properties
  
  
Shear Modulus
6.03 GPa   
99+
26.00 GPa   
29
Bulk Modulus
Not Available   
76.00 GPa   
18
Young's Modulus
15.70 GPa   
99+
70.00 GPa   
28
Poisson Ratio
0.28   
17
0.35   
9
Other Mechanical Properties
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
2.64   
99+
2.72   
99+
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Permeability
Not Available   
0.00 H/m   
4
Susceptibility
Not Available   
0.00   
3
Electrical Properties
  
  
Electrical Property
NA   
Conductor   
Resistivity
132.00 nΩ·m   
24
28.20 nΩ·m   
99+
Electrical Conductivity
0.08 106/cm Ω   
26
0.38 106/cm Ω   
4
Electron Affinity
5.03 kJ/mol   
38
42.50 kJ/mol   
26
Thermal Properties
Specific Heat
0.30 J/(kg K)   
18
0.90 J/(kg K)   
5
Molar Heat Capacity
26.40 J/mol·K   
28
24.20 J/mol·K   
99+
Thermal Conductivity
35.40 W/m·K   
37
237.00 W/m·K   
4
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
22.50 µm/(m·K)   
18
23.10 µm/(m·K)   
17
Enthalpy
  
  
Enthalpy of Vaporization
150.00 kJ/mol   
99+
293.70 kJ/mol   
31
Enthalpy of Fusion
9.16 kJ/mol   
38
10.67 kJ/mol   
35
Enthalpy of Atomization
163.20 kJ/mol   
99+
322.20 kJ/mol   
31
Standard Molar Entropy
55.00 J/mol.K   
26
28.30 J/mol.K   
99+
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