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Rutherfordium vs Strontium


Strontium vs Rutherfordium


Periodic Table

Symbol
Rf   
Sr   

Group Number
4   
14
2   
16

Period Number
7   
5   

Block
d block   
s block   

Element Family
Transition Metal   
Alkaline Earth   

CAS Number
53850365   
13
7440246   
99+

Space Group Name
Not Available   
Fm_ 3m   

Space Group Number
Not Available   
225.00   
2

Facts

Interesting Facts
  • Rutherfordium does not occur in nature as it is a synthetic element.
  • Till date Rutherfordium metal has 15 radioisotopes created synthetically.
  
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
  

Sources
Bombarding Plutonium with Accelerated 113 to 115 MeV Neon Ions, Synthetically Produced   
Found in Minerals, Mining, Ores of Minerals   

History
  
  

Who Discovered
Joint Institute for Nuclear Research   
William Cruickshank   

Discovery
In 1964   
In 1787   

Abundance
  
  

Abundance In Universe
Not Available   
4 * 10-6 %   
14

Abundance In Sun
~-9999 %   
~0.000005 %   
15

Abundance In Meteorites
Not Available   
0.00 %   
15

Abundance In Earth's Crust
Not Available   
0.04 %   
10

Abundance In Oceans
Not Available   
0.00 %   
4

Abundance In Humans
Not Available   
0.00 %   
7

Uses

Uses & Benefits
  • Currently known uses of Rutherfordium metal are limited to research purpose only.
  
  • 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.
  

Industrial Uses
NA   
Ammunition Industry, Chemical Industry   

Medical Uses
NA   
NA   

Other Uses
Alloys, Research Purposes   
Alloys   

Biological Properties
  
  

Toxicity
Unknown   
Non Toxic   

Present in Human Body
No   
Yes   

In Blood
0.00 Blood/mg dm-3   
37
0.03 Blood/mg dm-3   
19

In Bone
0.00 p.p.m.   
36
140.00 p.p.m.   
7

Physical Properties

Melting Point
2,100.00 °C   
11
769.00 °C   
99+

Boiling Point
5,500.00 °C   
3
1,384.00 °C   
99+

Appearance
  
  

Physical State
Solid   
Solid   

Color
Unknown   
Silvery White   

Luster
Unknown Luster   
Metallic   

Hardness
  
  

Mohs Hardness
Not Available   
1.50   
18

Speed of Sound
Not Available   
Not Available   

Optical Properties
  
  

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
Rf   
Sr   

Isotopes
  
  

Known Isotopes
13   
26
27   
12

Electronegativity
  
  

Pauling Electronegativity
Not Available   
0.95   
99+

Sanderson Electronegativity
Not Available   
0.72   
27

Allred Rochow Electronegativity
Not Available   
0.99   
37

Mulliken-Jaffe Electronegativity
Not Available   
1.00   
18

Allen Electronegativity
Not Available   
0.96   
40

Electropositivity
  
  

Pauling Electropositivity
Not Available   
3.05   
7

Ionization Energies
  
  

1st Energy Level
579.90 kJ/mol   
99+
549.50 kJ/mol   
99+

2nd Energy Level
1,389.40 kJ/mol   
99+
1,064.20 kJ/mol   
99+

3rd Energy Level
2,296.40 kJ/mol   
99+
4,138.00 kJ/mol   
10

4th Energy Level
3,077.90 kJ/mol   
99+
5,500.00 kJ/mol   
13

5th Energy Level
Not Available   
6,910.00 kJ/mol   
18

6th Energy Level
Not Available   
8,760.00 kJ/mol   
18

7th Energy level
Not Available   
10,230.00 kJ/mol   
19

8th Energy Level
Not Available   
11,800.00 kJ/mol   
19

9th Energy Level
Not Available   
15,600.00 kJ/mol   
17

10th Energy Level
Not Available   
17,100.00 kJ/mol   
19

11th Energy Level
Not Available   
31,270.00 kJ/mol   
6

Electrochemical Equivalent
Not Available   
1.64 g/amp-hr   
99+

Electron Work Function
Not Available   
2.59 eV   
99+

Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Ionization, Radioactive Isotopes, Radioactivity, Solubility   

Atomic Properties

Atomic Number
104   
14
38   
99+

Electron Configuration
[Rn] 5f14 6d2 7s2   
[Kr] 5s2   

Crystal Structure
Hexagonal Close Packed (HCP)   
Face Centered Cubic (FCC)   

Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
FCC-Crystal-Structure-of-Strontium.jpg#100   

Atom
  
  

Number of Protons
104   
14
38   
99+

Number of Neutrons
157   
7
50   
99+

Number of Electrons
104   
14
38   
99+

Radius of an Atom
  
  

Atomic Radius
150.00 pm   
33
215.00 pm   
5

Covalent Radius
157.00 pm   
31
195.00 pm   
15

Van der Waals Radius
Not Available   
249.00 pm   
7

Atomic Weight
267.00 amu   
11
87.62 amu   
99+

Atomic Volume
Not Available   
33.70 cm3/mol   
6

Adjacent Atomic Numbers
  
  

Previous Element
Lawrencium
  
Rubidium
  

Next Element
Dubnium
  
Yttrium
  

Valence Electron Potential
Not Available   
25.70 (-eV)   
99+

Lattice Constant
Not Available   
608.49 pm   
6

Lattice Angles
NA   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
23.20 g/cm3   
8
2.64 g/cm3   
99+

Density When Liquid (at m.p.)
Not Available   
2.38 g/cm3   
99+

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 1000 K
Not Available   
121.00 (Pa)   
1

Elasticity properties
  
  

Shear Modulus
Not Available   
6.03 GPa   
99+

Young's Modulus
Not Available   
15.70 GPa   
99+

Poisson Ratio
Not Available   
0.28   
17

Other Mechanical Properties
Unknown   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
Not Available   
2.64   
99+

Magnetic Ordering
Unknown   
Paramagnetic   

Electrical Properties
  
  

Electrical Property
Unknown   
NA   

Resistivity
Not Available   
132.00 nΩ·m   
24

Electrical Conductivity
Not Available   
0.08 106/cm Ω   
26

Electron Affinity
Not Available   
5.03 kJ/mol   
38

Thermal Properties

Specific Heat
Not Available   
0.30 J/(kg K)   
18

Molar Heat Capacity
Not Available   
26.40 J/mol·K   
28

Thermal Conductivity
Not Available   
35.40 W/m·K   
37

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
Not Available   
22.50 µm/(m·K)   
18

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
150.00 kJ/mol   
99+

Enthalpy of Fusion
Not Available   
9.16 kJ/mol   
38

Enthalpy of Atomization
Not Available   
163.20 kJ/mol   
99+

Standard Molar Entropy
Not Available   
55.00 J/mol.K   
26

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