Home
 Compare Metals

Radium vs Strontium

Radium
Strontium
Strontium vs Radium


Periodic Table
Symbol
Ra  
Sr  
Group Number
2  
16
2  
16
Period Number
7  
5  
Block
s block  
s block  
Element Family
Alkaline Earth  
Alkaline Earth  
CAS Number
7440144  
99+
7440246  
99+
Space Group Name
Im_ 3m  
Fm_ 3m  
Space Group Number
229.00  
2
225.00  
3
Facts
Interesting Facts
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
  
Sources
Mining, Ores of metals  
Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
-  
William Cruickshank  
Discovery
In 1898  
In 1787  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
15
Abundance In Sun
0.00 %  
26
0.00 %  
15
Abundance In Meteorites
-  
0.00 %  
15
Abundance In Earth's Crust
0.00 %  
99+
0.04 %  
10
Abundance In Oceans
0.00 %  
99+
0.00 %  
4
Abundance In Humans
0.00 %  
23
0.00 %  
8
Uses
Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
  • 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
-  
Ammunition Industry, Chemical Industry  
Medical Uses
Pharmaceutical Industry  
-  
Other Uses
-  
Alloys  
Biological Properties
  
  
Toxicity
Highly Toxic  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
34
0.03 Blood/mg dm-3  
19
In Bone
0.00 p.p.m.  
99+
140.00 p.p.m.  
7
Physical
Melting Point
700.00 °C  
99+
769.00 °C  
99+
Boiling Point
1,737.00 °C  
99+
1,384.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
1.00  
22
1.50  
19
Brinell Hardness
700.00 MPa  
17
110.00 MPa  
99+
Vickers Hardness
140.00 MPa  
99+
15.00 MPa  
99+
Speed of Sound
3,150.00 m/s  
37
4,170.00 m/s  
23
Optical Properties
  
  
Refractive Index
1.00  
99+
1.43  
39
Reflectivity
83.00 %  
6
65.00 %  
18
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ra  
Sr  
Isotopes
  
  
Known Isotopes
33  
6
27  
12
Electronegativity
  
  
Pauling Electronegativity
0.90  
99+
0.95  
99+
Sanderson Electronegativity
0.89  
99+
0.72  
99+
Allred Rochow Electronegativity
0.97  
39
0.99  
38
Mulliken-Jaffe Electronegativity
0.92  
99+
1.00  
99+
Allen Electronegativity
0.89  
99+
0.96  
99+
Electropositivity
  
  
Pauling Electropositivity
3.10  
5
3.05  
7
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
2nd Energy Level
979.00 kJ/mol  
99+
1,064.20 kJ/mol  
99+
3rd Energy Level
509.30 kJ/mol  
99+
4,138.00 kJ/mol  
10
4th Energy Level
5,093.00 kJ/mol  
27
5,500.00 kJ/mol  
22
5th Energy Level
5,090.00 kJ/mol  
99+
6,910.00 kJ/mol  
30
6th Energy Level
5,090.00 kJ/mol  
99+
8,760.00 kJ/mol  
26
7th Energy level
5,090.00 kJ/mol  
99+
10,230.00 kJ/mol  
19
8th Energy Level
5,090.00 kJ/mol  
99+
11,800.00 kJ/mol  
19
9th Energy Level
5,090.00 kJ/mol  
99+
15,600.00 kJ/mol  
17
10th Energy Level
5,090.00 kJ/mol  
99+
17,100.00 kJ/mol  
19
11th Energy Level
5,090.00 kJ/mol  
99+
31,270.00 kJ/mol  
6
12th Energy Level
5,090.00 kJ/mol  
99+
5,490.00 kJ/mol  
99+
13th Energy Level
5,090.00 kJ/mol  
99+
5,490.00 kJ/mol  
99+
14th Energy Level
5,090.00 kJ/mol  
99+
5,490.00 kJ/mol  
99+
15th Energy Level
50,900.00 kJ/mol  
99+
54,900.00 kJ/mol  
99+
16th Energy Level
50,900.00 kJ/mol  
99+
54,900.00 kJ/mol  
99+
17th Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
18th Energy Level
5,090.00 kJ/mol  
99+
5,490.00 kJ/mol  
99+
19th Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
20th Energy Level
509.00 kJ/mol  
99+
549.00 kJ/mol  
99+
21st Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
22nd Energy Level
509.00 kJ/mol  
99+
549.00 kJ/mol  
99+
23rd Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
24th Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
25th Energy Level
509.00 kJ/mol  
99+
549.00 kJ/mol  
99+
26th Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
27th Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
28th Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
29th Energy Level
509.30 kJ/mol  
99+
549.50 kJ/mol  
99+
30th Energy Level
509.00 kJ/mol  
99+
549.50 kJ/mol  
99+
Electrochemical Equivalent
4.22 g/amp-hr  
6
1.64 g/amp-hr  
99+
Electron Work Function
4.30 eV  
25
2.59 eV  
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Atomic
Atomic Number
88  
30
38  
99+
Electron Configuration
[Rn] 7s2  
[Kr] 5s2  
Crystal Structure
Body Centered Cubic (BCC)  
Face Centered Cubic (FCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
FCC-Crystal-Structure-of-Strontium.jpg#100  
Atom
  
  
Number of Protons
88  
30
38  
99+
Number of Neutrons
138  
17
50  
99+
Number of Electrons
88  
30
38  
99+
Radius of an Atom
  
  
Atomic Radius
215.00 pm  
6
215.00 pm  
6
Covalent Radius
221.00 pm  
3
195.00 pm  
15
Van der Waals Radius
283.00 pm  
5
249.00 pm  
11
Atomic Weight
226.00 amu  
26
87.62 amu  
99+
Atomic Volume
45.20 cm3/mol  
5
33.70 cm3/mol  
9
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Rubidium
  
Next Element
Actinium
  
Yttrium
  
Valence Electron Potential
20.10 (-eV)  
99+
25.70 (-eV)  
99+
Lattice Constant
514.80 pm  
15
608.49 pm  
6
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
99+
1.57  
40
Mechanical
Density
  
  
Density At Room Temperature
5.50 g/cm3  
99+
2.64 g/cm3  
99+
Density When Liquid (at m.p.)
5.50 g/cm3  
99+
2.38 g/cm3  
99+
Tensile Strength
40.00 MPa  
99+
170.00 MPa  
21
Viscosity
0.00  
2
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
16
121.00 (Pa)  
1
Vapor Pressure at 2000 K
0.00 (Pa)  
33
0.00 (Pa)  
38
Elasticity properties
  
  
Shear Modulus
25.00 GPa  
38
6.03 GPa  
99+
Bulk Modulus
43.00 GPa  
33
11.00 GPa  
99+
Young's Modulus
83.00 GPa  
25
15.70 GPa  
99+
Poisson Ratio
0.31  
13
0.28  
17
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
5.00  
99+
2.64  
99+
Magnetic Ordering
Nonmagnetic  
Paramagnetic  
Permeability
0.00 H/m  
9
0.00 H/m  
17
Susceptibility
0.00  
18
0.00  
35
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
100.00 nΩ·m  
31
132.00 nΩ·m  
24
Electrical Conductivity
0.00 106/cm Ω  
99+
0.08 106/cm Ω  
31
Electron Affinity
0.90 kJ/mol  
99+
5.03 kJ/mol  
99+
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.30 J/(kg K)  
18
Molar Heat Capacity
20.05 J/mol·K  
99+
26.40 J/mol·K  
36
Thermal Conductivity
18.60 W/m·K  
99+
35.40 W/m·K  
38
Critical Temperature
973.00 K  
99+
1,050.00 K  
99+
Thermal Expansion
8.50 µm/(m·K)  
99+
22.50 µm/(m·K)  
19
Enthalpy
  
  
Enthalpy of Vaporization
113.00 kJ/mol  
99+
150.00 kJ/mol  
99+
Enthalpy of Fusion
8.60 kJ/mol  
99+
9.16 kJ/mol  
99+
Enthalpy of Atomization
163.00 kJ/mol  
99+
163.20 kJ/mol  
99+
Standard Molar Entropy
71.00 J/mol.K  
14
55.00 J/mol.K  
34
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!