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Properties of Strontium and Ytterbium


Properties of Ytterbium & Strontium


Physical Properties

Melting Point
769.00 °C   
99+
824.00 °C   
99+

Boiling Point
1,384.00 °C   
99+
1,196.00 °C   
99+

Hardness
  
  

Mohs Hardness
1.50   
18
Not Available   

Brinell Hardness
Not Available   
343.00 MPa   
31

Vickers Hardness
Not Available   
206.00 MPa   
33

Optical Properties
  
  

Refractive Index
Not Available   
Not Available   

Reflectivity
Not Available   
Not Available   

Speed of Sound
Not Available   
1,590.00 m/s   
99+

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
Sr   
Yb   

Isotopes
  
  

Known Isotopes
27   
12
30   
9

Electronegativity
  
  

Pauling Electronegativity
0.95   
99+
Not Available   

Sanderson Electronegativity
0.72   
27
Not Available   

Allred Rochow Electronegativity
0.99   
37
1.06   
33

Mulliken-Jaffe Electronegativity
1.00   
18
Not Available   

Allen Electronegativity
0.96   
40
Not Available   

Electropositivity
  
  

Pauling Electropositivity
3.05   
7
Not Available   

Ionization Energies
  
  

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

2nd Energy Level
1,064.20 kJ/mol   
99+
1,174.80 kJ/mol   
99+

3rd Energy Level
4,138.00 kJ/mol   
10
2,417.00 kJ/mol   
99+

Electrochemical Equivalent
1.64 g/amp-hr   
99+
2.15 g/amp-hr   
25

Electron Work Function
2.59 eV   
99+
Not Available   

Other Chemical Properties
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces.Radioactivity, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility
  
?
Ionization is the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons to form ions, often in conjunction with other chemical changes.Ionization, 
?
Radioactive metals emit particles and radiation from their nuclei. This process comes in the picture because their nuclei experience the intense conflict between two strong forces. This metal also have radioactive isotopes.Radioactive Isotopes, 
?
Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent.Solubility
  

Mechanical Properties

Density
  
  

Density At Room Temperature
2.64 g/cm3   
99+
6.90 g/cm3   
99+

Density When Liquid (at m.p.)
2.38 g/cm3   
99+
6.21 g/cm3   
99+

Vapor Pressure
  
  

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

Vapor Pressure at 2000 K
Not Available   
Not Available   

Tensile Strength
Not Available   
58.00 MPa   
18

Viscosity
Not Available   
Not Available   

Elasticity properties
  
  

Shear Modulus
6.03 GPa   
99+
9.90 GPa   
99+

Bulk Modulus
Not Available   
30.50 GPa   
39

Young's Modulus
15.70 GPa   
99+
23.90 GPa   
99+

Poisson Ratio
0.28   
17
0.21   
33

Other Mechanical Properties
NA   
?
Ductility of metals defines their ability to deform under tensile stress; this is often characterized by the metals ability to be stretched into a wire.Ductile, 
?
Malleability of metals defines their ability to deform under compressive stress; this is often characterized by the metals ability to form a thin sheet by hammering or rolling.Malleable
  

Periodic Table

Symbol
Sr   
Yb   

Group Number
2   
16
Not Available   

Period Number
5   
6   

Block
?
The s-block is on the left side of the periodic table that includes elements from the first two columns, the alkali metals (group 1) and alkaline earth metals (group 2), plus helium.s block
  
?
The f-block is in the center-left of a 32-column periodic table but in the footnoted appendage of 18-column tables. These elements are not generally considered as part of any group. They are often called inner transition metals.f block
  

Element Family
?
All alkaline earth metals are placed under group number 2 and s-block of periodic table. These metals are somewhat reactive at standard conditions. Alkaline earth metals appear shiny, silvery-white and are found in the earth’s crust.Alkaline Earth
  
?
Total 15 metals are included in Lanthanide series from Lanthanum to Lutetium. Lanthanide series is located under f and d block of the periodic table.Lanthanide
  

Atomic Properties

Atomic Number
38   
99+
70   
99+

Atomic Weight
87.62 amu   
99+
173.05 amu   
99+

Atomic Volume
33.70 cm3/mol   
6
24.79 cm3/mol   
9

Electron Configuration
[Kr] 5s2   
[Xe] 4f14 6s2   

Valence Electron Potential
25.70 (-eV)   
99+
50.30 (-eV)   
27

Atom
  
  

Number of Protons
38   
99+
70   
99+

Number of Neutrons
50   
99+
103   
31

Number of Electrons
38   
99+
70   
99+

Crystal Structure
?
In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.Face Centered Cubic (FCC)
  
?
In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube. This is one of the most common and simplest shapes found in crystals and minerals.Face Centered Cubic (FCC)
  

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

Radius of an Atom
  
  

Atomic Radius
215.00 pm   
5
176.00 pm   
18

Covalent Radius
195.00 pm   
15
187.00 pm   
20

Van der Waals Radius
249.00 pm   
7
242.00 pm   
12

Lattice Constant
608.49 pm   
6
548.47 pm   
11

Lattice Angles
π/2, π/2, π/2   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
Not Available   

Adjacent Atomic Numbers
  
  

Next Element
Yttrium
  
Lutetium
  

Previous Element
Rubidium
  
Thulium
  

Magnetic Properties

Electrical Properties
  
  

Resistivity
132.00 nΩ·m   
24
0.25 nΩ·m   
99+

Electrical Conductivity
0.08 106/cm Ω   
26
0.04 106/cm Ω   
38

Electron Affinity
5.03 kJ/mol   
38
50.00 kJ/mol   
21

Electrical Property
NA   
?
Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor
  

Magnetic Characteristics
  
  

Specific Gravity
2.64   
99+
6.97   
99+

Magnetic Ordering
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic
  
?
Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic
  

Permeability
Not Available   
Not Available   

Susceptibility
Not Available   
Not Available   

Thermal Properties

Specific Heat
0.30 J/(kg K)   
18
0.15 J/(kg K)   
36

Thermal Conductivity
35.40 W/m·K   
37
38.50 W/m·K   
35

Critical Temperature
Not Available   
26.30 K   
7

Molar Heat Capacity
26.40 J/mol·K   
28
26.74 J/mol·K   
25

Thermal Expansion
22.50 µm/(m·K)   
18
26.30 µm/(m·K)   
14

Standard Molar Entropy
55.00 J/mol.K   
26
59.90 J/mol.K   
21

Enthalpy
  
  

Enthalpy of Vaporization
150.00 kJ/mol   
99+
128.90 kJ/mol   
99+

Enthalpy of Fusion
9.16 kJ/mol   
38
7.66 kJ/mol   
99+

Enthalpy of Atomization
163.20 kJ/mol   
99+
180.00 kJ/mol   
99+

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