Home
 Compare Metals

Strontium vs Niobium

Strontium
Niobium
Niobium vs Strontium


Periodic Table
Symbol
Sr  
Nb  
Group Number
2  
16
5  
13
Period Number
5  
5  
Block
s block  
d block  
Element Family
Alkaline Earth  
Transition Metal  
CAS Number
7440246  
99+
7440031  
99+
Space Group Name
Fm_ 3m  
Im_ 3m  
Space Group Number
225.00  
3
229.00  
2
Facts
Interesting Facts
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
  
  • Niobium metal was used to get called Columbium in past.
  • Niobium metal found freely in nature (abundance).
  
Sources
Found in Minerals, Mining, Ores of Minerals  
By-product of Tin Extraction, Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
William Cruickshank  
Charles Hatchett  
Discovery
In 1787  
In 1801  
Abundance
  
  
Abundance In Universe
0.00 %  
15
0.00 %  
23
Abundance In Sun
0.00 %  
15
0.00 %  
23
Abundance In Meteorites
0.00 %  
15
0.00 %  
35
Abundance In Earth's Crust
0.04 %  
10
0.00 %  
25
Abundance In Oceans
0.00 %  
4
0.00 %  
34
Abundance In Humans
0.00 %  
8
0.00 %  
24
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.
  
  • Niobium alloys are used in jet engines and rockets and spacecraft, beams and girders for buildings and oil and gas pipelines.
  • It is used superconducting magnets in particles accelerators, NMR and MRI equipment.
  
Industrial Uses
Ammunition Industry, Chemical Industry  
Aerospace Industry, Ammunition Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Alloys  
Alloys  
Biological Properties
  
  
Toxicity
Non Toxic  
Low Toxic  
Present in Human Body
Yes  
Yes  
In Blood
0.03 Blood/mg dm-3  
19
0.01 Blood/mg dm-3  
25
In Bone
140.00 p.p.m.  
7
0.07 p.p.m.  
30
Physical
Melting Point
769.00 °C  
99+
2,468.00 °C  
6
Boiling Point
1,384.00 °C  
99+
2,468.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Gray  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
1.50  
19
6.00  
6
Brinell Hardness
110.00 MPa  
99+
735.00 MPa  
15
Vickers Hardness
15.00 MPa  
99+
870.00 MPa  
19
Speed of Sound
4,170.00 m/s  
23
3,480.00 m/s  
31
Optical Properties
  
  
Refractive Index
1.43  
39
2.30  
8
Reflectivity
65.00 %  
18
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Sr  
Nb  
Isotopes
  
  
Known Isotopes
27  
12
17  
22
Electronegativity
  
  
Pauling Electronegativity
0.95  
99+
1.60  
24
Sanderson Electronegativity
0.72  
99+
1.42  
20
Allred Rochow Electronegativity
0.99  
38
1.23  
26
Mulliken-Jaffe Electronegativity
1.00  
99+
1.60  
22
Allen Electronegativity
0.96  
99+
1.41  
35
Electropositivity
  
  
Pauling Electropositivity
3.05  
7
2.40  
31
Ionization Energies
  
  
1st Energy Level
549.50 kJ/mol  
99+
652.10 kJ/mol  
99+
2nd Energy Level
1,064.20 kJ/mol  
99+
1,380.00 kJ/mol  
99+
3rd Energy Level
4,138.00 kJ/mol  
10
2,416.00 kJ/mol  
99+
4th Energy Level
5,500.00 kJ/mol  
22
3,700.00 kJ/mol  
99+
5th Energy Level
6,910.00 kJ/mol  
30
4,877.00 kJ/mol  
99+
6th Energy Level
8,760.00 kJ/mol  
26
9,847.00 kJ/mol  
17
7th Energy level
10,230.00 kJ/mol  
19
12,100.00 kJ/mol  
14
8th Energy Level
11,800.00 kJ/mol  
19
6,520.00 kJ/mol  
99+
9th Energy Level
15,600.00 kJ/mol  
17
5,470.00 kJ/mol  
99+
10th Energy Level
17,100.00 kJ/mol  
19
5,470.00 kJ/mol  
99+
11th Energy Level
31,270.00 kJ/mol  
6
6,520.00 kJ/mol  
99+
12th Energy Level
5,490.00 kJ/mol  
99+
6,520.00 kJ/mol  
99+
13th Energy Level
5,490.00 kJ/mol  
99+
5,470.00 kJ/mol  
99+
14th Energy Level
5,490.00 kJ/mol  
99+
691.00 kJ/mol  
99+
15th Energy Level
54,900.00 kJ/mol  
99+
65,200.00 kJ/mol  
35
16th Energy Level
54,900.00 kJ/mol  
99+
652.10 kJ/mol  
99+
17th Energy Level
549.50 kJ/mol  
99+
652.10 kJ/mol  
99+
18th Energy Level
5,490.00 kJ/mol  
99+
6,520.00 kJ/mol  
37
19th Energy Level
549.50 kJ/mol  
99+
652.10 kJ/mol  
99+
20th Energy Level
549.00 kJ/mol  
99+
652.00 kJ/mol  
38
21st Energy Level
549.50 kJ/mol  
99+
652.10 kJ/mol  
99+
22nd Energy Level
549.00 kJ/mol  
99+
694.00 kJ/mol  
30
23rd Energy Level
549.50 kJ/mol  
99+
4,490.00 kJ/mol  
30
24th Energy Level
549.50 kJ/mol  
99+
652.10 kJ/mol  
33
25th Energy Level
549.00 kJ/mol  
99+
652.10 kJ/mol  
35
26th Energy Level
549.50 kJ/mol  
99+
652.10 kJ/mol  
34
27th Energy Level
549.50 kJ/mol  
99+
652.10 kJ/mol  
35
28th Energy Level
549.50 kJ/mol  
99+
652.10 kJ/mol  
40
29th Energy Level
549.50 kJ/mol  
99+
652.10 kJ/mol  
99+
30th Energy Level
549.50 kJ/mol  
99+
652.00 kJ/mol  
37
Electrochemical Equivalent
1.64 g/amp-hr  
99+
0.69 g/amp-hr  
99+
Electron Work Function
2.59 eV  
99+
4.30 eV  
25
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
38  
99+
41  
99+
Electron Configuration
[Kr] 5s2  
[Kr] 4d4 5s1  
Crystal Structure
Face Centered Cubic (FCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Strontium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
38  
99+
41  
99+
Number of Neutrons
50  
99+
52  
99+
Number of Electrons
38  
99+
41  
99+
Radius of an Atom
  
  
Atomic Radius
215.00 pm  
6
146.00 pm  
37
Covalent Radius
195.00 pm  
15
164.00 pm  
30
Van der Waals Radius
249.00 pm  
11
200.00 pm  
35
Atomic Weight
87.62 amu  
99+
92.91 amu  
99+
Atomic Volume
33.70 cm3/mol  
9
10.87 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Rubidium
  
Zirconium
  
Next Element
Yttrium
  
Molybdenum
  
Valence Electron Potential
25.70 (-eV)  
99+
104.00 (-eV)  
8
Lattice Constant
608.49 pm  
6
330.04 pm  
99+
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
40
1.47  
99+
Mechanical
Density
  
  
Density At Room Temperature
2.64 g/cm3  
99+
8.57 g/cm3  
99+
Density When Liquid (at m.p.)
2.38 g/cm3  
99+
8.57 g/cm3  
99+
Tensile Strength
170.00 MPa  
21
330.00 MPa  
14
Viscosity
0.00  
2
0.00  
22
Vapor Pressure
  
  
Vapor Pressure at 1000 K
121.00 (Pa)  
1
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
38
0.00 (Pa)  
36
Elasticity properties
  
  
Shear Modulus
6.03 GPa  
99+
38.00 GPa  
20
Bulk Modulus
11.00 GPa  
99+
170.00 GPa  
10
Young's Modulus
15.70 GPa  
99+
105.00 GPa  
22
Poisson Ratio
0.28  
17
0.40  
4
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
2.64  
99+
8.57  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
4
Susceptibility
0.00  
35
0.00  
30
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
132.00 nΩ·m  
24
152.00 nΩ·m  
23
Electrical Conductivity
0.08 106/cm Ω  
31
0.07 106/cm Ω  
33
Electron Affinity
5.03 kJ/mol  
99+
86.10 kJ/mol  
14
Thermal
Specific Heat
0.30 J/(kg K)  
18
0.26 J/(kg K)  
20
Molar Heat Capacity
26.40 J/mol·K  
36
24.60 J/mol·K  
99+
Thermal Conductivity
35.40 W/m·K  
38
53.70 W/m·K  
29
Critical Temperature
1,050.00 K  
99+
2,750.00 K  
7
Thermal Expansion
22.50 µm/(m·K)  
19
7.30 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
150.00 kJ/mol  
99+
696.60 kJ/mol  
5
Enthalpy of Fusion
9.16 kJ/mol  
99+
27.20 kJ/mol  
6
Enthalpy of Atomization
163.20 kJ/mol  
99+
745.00 kJ/mol  
4
Standard Molar Entropy
55.00 J/mol.K  
34
36.40 J/mol.K  
99+
Periodic Table >>
<< All

Compare Alkali Metals

Alkali Metals

Alkali Metals

» More Alkali Metals

Compare Alkali Metals

» More Compare Alkali Metals
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!