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Sr Element
Strontium


Periodic Table
0
Symbol
Sr 0
Group Number
2 16
Period Number
5 3
Block
s block 0
Element Family
Alkaline Earth 0
CAS Number
7440246 56
Space Group Name
Fm_ 3m 0
Space Group Number
225.00 2
Facts
0
Interesting Facts
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
0
Sources
Found in Minerals, Mining, Ores of Minerals 0
History
0
Who Discovered
William Cruickshank 0
Discovery
In 1787 0
Abundance
0
Abundance In Universe
4 * 10-6 % 14
Abundance In Sun
~0.000005 % 15
Abundance In Meteorites
0.00 % 15
Abundance In Earth's Crust
0.04 % 10
Abundance In Oceans
0.00 % 4
Abundance In Humans
0.00 % 7
Uses
0
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.
0
Industrial Uses
Ammunition Industry, Chemical Industry 0
Medical Uses
NA 0
Other Uses
Alloys 0
Biological Properties
0
Toxicity
Non Toxic 0
Present in Human Body
Yes 0
In Blood
0.03 Blood/mg dm-3 19
In Bone
140.00 p.p.m. 7
Physical
0
Melting Point
769.00 °C 57
Boiling Point
1,384.00 °C 61
Appearance
0
Physical State
Solid 0
Color
Silvery White 0
Luster
Metallic 0
Hardness
0
Mohs Hardness
1.50 18
Brinell Hardness
Not Available 0
Vickers Hardness
Not Available 0
Speed of Sound
Not Available 0
Optical Properties
0
Refractive Index
Not Available 0
Reflectivity
Not Available 0
Allotropes
No 0
α Allotropes
Not Available 0
β Allotropes
Not Available 0
γ Allotropes
Not Available 0
Chemical
0
Chemical Formula
Sr 0
Isotopes
0
Known Isotopes
27 12
Electronegativity
0
Pauling Electronegativity
0.95 47
Sanderson Electronegativity
0.72 27
Allred Rochow Electronegativity
0.99 37
Mulliken-Jaffe Electronegativity
1.00 18
Allen Electronegativity
0.96 40
Electropositivity
0
Pauling Electropositivity
3.05 7
Ionization Energies
0
1st Energy Level
549.50 kJ/mol 70
2nd Energy Level
1,064.20 kJ/mol 77
3rd Energy Level
4,138.00 kJ/mol 10
4th Energy Level
5,500.00 kJ/mol 13
5th Energy Level
6,910.00 kJ/mol 18
6th Energy Level
8,760.00 kJ/mol 18
7th Energy level
10,230.00 kJ/mol 19
8th Energy Level
11,800.00 kJ/mol 19
9th Energy Level
15,600.00 kJ/mol 17
10th Energy Level
17,100.00 kJ/mol 19
11th Energy Level
31,270.00 kJ/mol 6
12th Energy Level
Not Available 0
13th Energy Level
Not Available 0
14th Energy Level
Not Available 0
15th Energy Level
Not Available 0
16th Energy Level
Not Available 0
17th Energy Level
Not Available 0
18th Energy Level
Not Available 0
19th Energy Level
Not Available 0
20th Energy Level
Not Available 0
21st Energy Level
Not Available 0
22nd Energy Level
Not Available 0
23rd Energy Level
Not Available 0
24th Energy Level
Not Available 0
25th Energy Level
Not Available 0
26th Energy Level
Not Available 0
27th Energy Level
Not Available 0
28th Energy Level
Not Available 0
29th Energy Level
Not Available 0
30th Energy Level
Not Available 0
Electrochemical Equivalent
1.64 g/amp-hr 45
Electron Work Function
2.59 eV 42
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility 0
Atomic
0
Atomic Number
38 74
Electron Configuration
[Kr] 5s2 0
Crystal Structure
Face Centered Cubic (FCC) 0
Crystal Lattice
FCC-Crystal-Structure-of-Strontium.jpg#100 0
Atom
0
Number of Protons
38 73
Number of Neutrons
50 55
Number of Electrons
38 73
Radius of an Atom
0
Atomic Radius
215.00 pm 5
Covalent Radius
195.00 pm 15
Van der Waals Radius
249.00 pm 7
Atomic Weight
87.62 amu 68
Atomic Volume
33.70 cm3/mol 6
Adjacent Atomic Numbers
0
Previous Element
45 0
Next Element
59 0
Valence Electron Potential
25.70 (-eV) 56
Lattice Constant
608.49 pm 6
Lattice Angles
π/2, π/2, π/2 0
Lattice C/A Ratio
Not Available 0
Mechanical
0
Density
0
Density At Room Temperature
2.64 g/cm3 75
Density When Liquid (at m.p.)
2.38 g/cm3 52
Tensile Strength
Not Available 0
Viscosity
Not Available 0
Vapor Pressure
0
Vapor Pressure at 1000 K
121.00 (Pa) 1
Vapor Pressure at 2000 K
Not Available 0
Elasticity properties
0
Shear Modulus
6.03 GPa 46
Bulk Modulus
Not Available 0
Young's Modulus
15.70 GPa 49
Poisson Ratio
0.28 17
Other Mechanical Properties
NA 0
Magnetic
0
Magnetic Characteristics
0
Specific Gravity
2.64 63
Magnetic Ordering
Paramagnetic 0
Permeability
Not Available 0
Susceptibility
Not Available 0
Electrical Properties
0
Electrical Property
NA 0
Resistivity
132.00 nΩ·m 24
Electrical Conductivity
0.08 106/cm Ω 26
Electron Affinity
5.03 kJ/mol 38
Thermal
0
Specific Heat
0.30 J/(kg K) 18
Molar Heat Capacity
26.40 J/mol·K 28
Thermal Conductivity
35.40 W/m·K 37
Critical Temperature
Not Available 0
Thermal Expansion
22.50 µm/(m·K) 18
Enthalpy
0
Enthalpy of Vaporization
150.00 kJ/mol 47
Enthalpy of Fusion
9.16 kJ/mol 38
Enthalpy of Atomization
163.20 kJ/mol 50
Standard Molar Entropy
55.00 J/mol.K 26
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