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Strontium Nobelium Comparison

Strontium
Nobelium
Nobelium Strontium comparison


Periodic Table
Symbol
Sr  
No  
Group Number
2  
16
3  
15
Period Number
5  
7  
Block
s block  
f block  
Element Family
Alkaline Earth  
Actinide  
CAS Number
7440246  
99+
10028145  
16
Space Group Name
Fm_ 3m  
-  
Space Group Number
225.00  
3
194.00  
7
Facts
Interesting Facts
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
  
  • The most stable isotope of Nobelium metal is No-259.
  • No-259 has a half-life of fifty-eight minutes.
  
Sources
Found in Minerals, Mining, Ores of Minerals  
Bombarding Curium-246 or Curium-249 with Carbon-12 Nuclei, Found in Minerals, Mining  
History
  
  
Who Discovered
William Cruickshank  
Joint Institute for Nuclear Research  
Discovery
In 1787  
In 1966  
Abundance
  
  
Abundance In Universe
0.00 %  
15
-  
Abundance In Sun
0.00 %  
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 %  
8
-  
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.
  
  • Currently known uses of Nobelium metal are limited to research purpose only.
  
Industrial Uses
Ammunition Industry, Chemical Industry  
-  
Medical Uses
-  
-  
Other Uses
Alloys  
Research Purposes  
Biological Properties
  
  
Toxicity
Non Toxic  
-  
Present in Human Body
Yes  
No  
In Blood
0.03 Blood/mg dm-3  
19
0.00 Blood/mg dm-3  
40
In Bone
140.00 p.p.m.  
7
0.00 p.p.m.  
99+
Physical
Melting Point
769.00 °C  
99+
827.00 °C  
99+
Boiling Point
1,384.00 °C  
99+
2,600.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
-  
Luster
Metallic  
Unknown Luster  
Hardness
  
  
Mohs Hardness
1.50  
19
-  
Brinell Hardness
110.00 MPa  
99+
500.00 MPa  
28
Vickers Hardness
15.00 MPa  
99+
500.00 MPa  
35
Speed of Sound
4,170.00 m/s  
23
1,100.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.43  
39
1.30  
99+
Reflectivity
65.00 %  
18
61.00 %  
22
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Sr  
No  
Isotopes
  
  
Known Isotopes
27  
12
13  
26
Electronegativity
  
  
Pauling Electronegativity
0.95  
99+
1.30  
33
Sanderson Electronegativity
0.72  
99+
1.30  
25
Allred Rochow Electronegativity
0.99  
38
1.20  
28
Mulliken-Jaffe Electronegativity
1.00  
99+
1.30  
33
Allen Electronegativity
0.96  
99+
1.10  
99+
Electropositivity
  
  
Pauling Electropositivity
3.05  
7
2.70  
22
Ionization Energies
  
  
1st Energy Level
549.50 kJ/mol  
99+
642.00 kJ/mol  
99+
2nd Energy Level
1,064.20 kJ/mol  
99+
1,254.00 kJ/mol  
99+
3rd Energy Level
4,138.00 kJ/mol  
10
2,643.00 kJ/mol  
99+
4th Energy Level
5,500.00 kJ/mol  
22
3,956.00 kJ/mol  
99+
5th Energy Level
6,910.00 kJ/mol  
30
6,400.00 kJ/mol  
35
6th Energy Level
8,760.00 kJ/mol  
26
6,400.00 kJ/mol  
99+
7th Energy level
10,230.00 kJ/mol  
19
6,270.00 kJ/mol  
99+
8th Energy Level
11,800.00 kJ/mol  
19
6,270.00 kJ/mol  
99+
9th Energy Level
15,600.00 kJ/mol  
17
6,270.00 kJ/mol  
99+
10th Energy Level
17,100.00 kJ/mol  
19
6,270.00 kJ/mol  
99+
11th Energy Level
31,270.00 kJ/mol  
6
6,420.00 kJ/mol  
99+
12th Energy Level
5,490.00 kJ/mol  
99+
64,000.00 kJ/mol  
8
13th Energy Level
5,490.00 kJ/mol  
99+
6,400.00 kJ/mol  
36
14th Energy Level
5,490.00 kJ/mol  
99+
6,400.00 kJ/mol  
26
15th Energy Level
54,900.00 kJ/mol  
99+
64,000.00 kJ/mol  
36
16th Energy Level
54,900.00 kJ/mol  
99+
64,000.00 kJ/mol  
27
17th Energy Level
549.50 kJ/mol  
99+
641.00 kJ/mol  
99+
18th Energy Level
5,490.00 kJ/mol  
99+
3,500.00 kJ/mol  
99+
19th Energy Level
549.50 kJ/mol  
99+
627.60 kJ/mol  
99+
20th Energy Level
549.00 kJ/mol  
99+
627.00 kJ/mol  
99+
21st Energy Level
549.50 kJ/mol  
99+
917.00 kJ/mol  
34
22nd Energy Level
549.00 kJ/mol  
99+
627.00 kJ/mol  
36
23rd Energy Level
549.50 kJ/mol  
99+
6,410.00 kJ/mol  
12
24th Energy Level
549.50 kJ/mol  
99+
627.00 kJ/mol  
39
25th Energy Level
549.00 kJ/mol  
99+
0.00 kJ/mol  
99+
26th Energy Level
549.50 kJ/mol  
99+
601.20 kJ/mol  
99+
27th Energy Level
549.50 kJ/mol  
99+
641.00 kJ/mol  
37
28th Energy Level
549.50 kJ/mol  
99+
641.60 kJ/mol  
99+
29th Energy Level
549.50 kJ/mol  
99+
641.00 kJ/mol  
99+
30th Energy Level
549.50 kJ/mol  
99+
627.00 kJ/mol  
99+
Electrochemical Equivalent
1.64 g/amp-hr  
99+
4.83 g/amp-hr  
4
Electron Work Function
2.59 eV  
99+
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
38  
99+
102  
16
Electron Configuration
[Kr] 5s2  
[Rn] 5f14 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Not Known  
Crystal Lattice
FCC-Crystal-Structure-of-Strontium.jpg#100  
Unknown-Crystal-Structure-of-Nobelium.jpg#100  
Atom
  
  
Number of Protons
38  
99+
102  
16
Number of Neutrons
50  
99+
157  
8
Number of Electrons
38  
99+
102  
16
Radius of an Atom
  
  
Atomic Radius
215.00 pm  
6
176.00 pm  
20
Covalent Radius
195.00 pm  
15
157.00 pm  
33
Van der Waals Radius
249.00 pm  
11
246.00 pm  
12
Atomic Weight
87.62 amu  
99+
259.00 amu  
13
Atomic Volume
33.70 cm3/mol  
9
19.80 cm3/mol  
33
Adjacent Atomic Numbers
  
  
Previous Element
Rubidium
  
Mendelevium
  
Next Element
Yttrium
  
Lawrencium
  
Valence Electron Potential
25.70 (-eV)  
99+
26.00 (-eV)  
99+
Lattice Constant
608.49 pm  
6
-  
Lattice Angles
π/2, π/2, π/2  
-  
Lattice C/A Ratio
1.57  
40
1.76  
5
Mechanical
Density
  
  
Density At Room Temperature
2.64 g/cm3  
99+
9.90 g/cm3  
99+
Density When Liquid (at m.p.)
2.38 g/cm3  
99+
9.90 g/cm3  
99+
Tensile Strength
170.00 MPa  
21
80.00 MPa  
29
Viscosity
0.00  
2
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
121.00 (Pa)  
1
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
38
0.00 (Pa)  
28
Elasticity properties
  
  
Shear Modulus
6.03 GPa  
99+
27.00 GPa  
34
Bulk Modulus
11.00 GPa  
99+
8.70 GPa  
99+
Young's Modulus
15.70 GPa  
99+
12.30 GPa  
99+
Poisson Ratio
0.28  
17
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
2.64  
99+
9.90  
99+
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
17
0.00 H/m  
3
Susceptibility
0.00  
35
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
132.00 nΩ·m  
24
0.68 nΩ·m  
99+
Electrical Conductivity
0.08 106/cm Ω  
31
0.00 106/cm Ω  
99+
Electron Affinity
5.03 kJ/mol  
99+
50.00 kJ/mol  
26
Thermal
Specific Heat
0.30 J/(kg K)  
18
0.10 J/(kg K)  
99+
Molar Heat Capacity
26.40 J/mol·K  
36
27.00 J/mol·K  
29
Thermal Conductivity
35.40 W/m·K  
38
0.10 W/m·K  
99+
Critical Temperature
1,050.00 K  
99+
1,100.00 K  
99+
Thermal Expansion
22.50 µm/(m·K)  
19
11.00 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
150.00 kJ/mol  
99+
-  
Enthalpy of Fusion
9.16 kJ/mol  
99+
-  
Enthalpy of Atomization
163.20 kJ/mol  
99+
390.40 kJ/mol  
30
Standard Molar Entropy
55.00 J/mol.K  
34
63.00 J/mol.K  
24
Summary >>
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