Ruthenium Strontium Comparison
Periodic Table
Symbol
Ru
Sr
Group Number
8
10
2
16
Period Number
5
5
Block
d block
s block
Element Family
Transition Metal
Alkaline Earth
CAS Number
7440188
99+
7440246
99+
Space Group Name
P63/mmc
Fm_ 3m
Space Group Number
194.00
5
225.00
2
Facts
Interesting Facts
- Ruthenium element has been extracted from used nuclear fuel.
- Ruthenium metal also produces as a by-product of the Nickel mining.
- Strontium element is softer than Calcium.
- Silvery Strontium turns yellow, if exposed to air.
Sources
By-product of Nickel Refining, Found in Minerals, Mining
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Karl Ernst Claus
William Cruickshank
Discovery
In 1844
In 1787
Abundance
Abundance In Universe
4 * 10-7 %
20
4 * 10-6 %
14
Abundance In Sun
~0.0000005 %
22
~0.000005 %
15
Abundance In Meteorites
0.00 %
26
0.00 %
15
Abundance In Earth's Crust
0.00 %
99+
0.04 %
10
Abundance In Oceans
0.00 %
38
0.00 %
4
Abundance In Humans
Not Available
0.00 %
7
Uses
Uses & Benefits
- It is used for producing chip resistors and contact.
- Ruthenium oxide is used to coat the anodes cells for chlorine production in chemical industry. It also works as catalysts for ammonia and acetic acid reaction.
- 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
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Ammunition Industry, Chemical Industry
Medical Uses
Medical Research
NA
Other Uses
Alloys
Alloys
Biological Properties
Toxicity
Low Toxic
Non Toxic
Present in Human Body
No
Yes
In Blood
Not Available
0.03 Blood/mg dm-3
19
In Bone
Not Available
140.00 p.p.m.
7
Physical Properties
Melting Point
2,250.00 °C
8
769.00 °C
99+
Boiling Point
3,900.00 °C
14
1,384.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery White
Luster
Metallic
Metallic
Hardness
Mohs Hardness
6.50
5
1.50
18
Brinell Hardness
2,160.00 MPa
3
Not Available
Speed of Sound
5,970.00 m/s
4
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
Ru
Sr
Isotopes
Known Isotopes
26
13
27
12
Electronegativity
Pauling Electronegativity
2.20
4
0.95
99+
Sanderson Electronegativity
Not Available
0.72
27
Allred Rochow Electronegativity
1.42
18
0.99
37
Mulliken-Jaffe Electronegativity
Not Available
1.00
18
Allen Electronegativity
1.54
25
0.96
40
Electropositivity
Pauling Electropositivity
1.80
99+
3.05
7
Ionization Energies
1st Energy Level
710.20 kJ/mol
32
549.50 kJ/mol
99+
2nd Energy Level
710.22 kJ/mol
99+
1,064.20 kJ/mol
99+
3rd Energy Level
2,747.00 kJ/mol
37
4,138.00 kJ/mol
10
4th Energy Level
Not Available
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
1.26 g/amp-hr
99+
1.64 g/amp-hr
99+
Electron Work Function
4.71 eV
9
2.59 eV
99+
Other Chemical Properties
Anti Corrosion, Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
44
99+
38
99+
Electron Configuration
[Kr] 4d7 5s1
[Kr] 5s2
Crystal Structure
Hexagonal Close Packed (HCP)
Face Centered Cubic (FCC)
Crystal Lattice
rystal-Structure-of-Ruthenium.jpg#100
FCC-Crystal-Structure-of-Strontium.jpg#100
Atom
Number of Protons
44
99+
38
99+
Number of Neutrons
57
99+
50
99+
Number of Electrons
44
99+
38
99+
Radius of an Atom
Atomic Radius
134.00 pm
99+
215.00 pm
5
Covalent Radius
146.00 pm
38
195.00 pm
15
Van der Waals Radius
200.00 pm
28
249.00 pm
7
Atomic Weight
101.07 amu
99+
87.62 amu
99+
Atomic Volume
8.30 cm3/mol
99+
33.70 cm3/mol
6
Adjacent Atomic Numbers
Valence Electron Potential
64.00 (-eV)
22
25.70 (-eV)
99+
Lattice Constant
270.59 pm
99+
608.49 pm
6
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
1.58
11
Not Available
Mechanical Properties
Density
Density At Room Temperature
12.45 g/cm3
27
2.64 g/cm3
99+
Density When Liquid (at m.p.)
10.65 g/cm3
16
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
Vapor Pressure at 2000 K
0.00 (Pa)
23
Not Available
Elasticity properties
Shear Modulus
173.00 GPa
4
6.03 GPa
99+
Bulk Modulus
220.00 GPa
7
Not Available
Young's Modulus
447.00 GPa
3
15.70 GPa
99+
Poisson Ratio
0.30
14
0.28
17
Other Mechanical Properties
Ductile, Malleable
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
12.45
19
2.64
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Conductor
NA
Resistivity
71.00 nΩ·m
38
132.00 nΩ·m
24
Electrical Conductivity
0.14 106/cm Ω
16
0.08 106/cm Ω
26
Electron Affinity
101.30 kJ/mol
10
5.03 kJ/mol
38
Thermal Properties
Specific Heat
0.24 J/(kg K)
24
0.30 J/(kg K)
18
Molar Heat Capacity
24.06 J/mol·K
99+
26.40 J/mol·K
28
Thermal Conductivity
117.00 W/m·K
13
35.40 W/m·K
37
Critical Temperature
Not Available
Not Available
Thermal Expansion
6.40 µm/(m·K)
99+
22.50 µm/(m·K)
18
Enthalpy
Enthalpy of Vaporization
567.80 kJ/mol
10
150.00 kJ/mol
99+
Enthalpy of Fusion
25.50 kJ/mol
7
9.16 kJ/mol
38
Enthalpy of Atomization
603.00 kJ/mol
9
163.20 kJ/mol
99+
Standard Molar Entropy
28.50 J/mol.K
99+
55.00 J/mol.K
26
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