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Radium
Radium

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Calcium



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Radium Calcium Comparison

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1 Periodic Table
1.1 Symbol
Ra
Ca
1.2 Group Number
22
Gadolinium Metal
0 17
1.4 Period Number
74
Lithium Metal
2 7
1.6 Block
s block
s block
1.7 Element Family
Alkaline Earth
Alkaline Earth
1.8 CAS Number
74401447440702
Aluminium Metal
7429905 54386242
1.9 Space Group Name
Im_ 3m
Fm_ 3m
1.10 Space Group Number
229.00225.00
Plutonium Metal
11 229
2 Facts
2.1 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.
  • Calcium ranks 5th rank in the list of earth’s abundance Percentage.
  • It is found in the compound state.
  • Gypsum or calcium sulfate is used as plaster and plaster of paris.
2.2 Sources
Mining, Ores of metals
Earth's crust, Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Not Available
Humphry Davy
2.3.2 Discovery
In 1898
In 1808
2.4 Abundance
2.4.1 Abundance In Universe
NA7 * 10-3 %
Thallium Metal
5E-09 0.11
2.4.3 Abundance In Sun
~-9999 %~0.007 %
Beryllium Metal
1E-08 0.1
2.4.5 Abundance In Meteorites
NA1.10 %
Gold Metal
1.7E-07 22
2.4.8 Abundance In Earth's Crust
0.00 %5.00 %
Palladium
9.9E-12 8.1
2.4.9 Abundance In Oceans
0.00 %0.00 %
Protactinium Metal
2E-23 1.1
2.4.11 Abundance In Humans
0.00 %1.40 %
Tin
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  • It is used as a reducing agent while preparing metals like thorium and uranium. It is also used as an alloying agent for metals such as aluminum, copper & lead.
  • Calcium carbonate or lime stone is used in cement.
3.1.1 Industrial Uses
NA
Chemical Industry
3.1.2 Medical Uses
Pharmaceutical Industry
Dentistry, Pharmaceutical Industry
3.1.3 Other Uses
NA
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Highly Toxic
Non Toxic
3.2.2 Present in Human Body
3.2.3 In Blood
NA60.50 Blood/mg dm-3
Plutonium Metal
0 1970
3.2.5 In Bone
NA170,000.00 p.p.m.
Plutonium Metal
0 170000
4 Physical
4.1 Melting Point
700.00 °C839.00 °C
Francium Metal
27 3410
4.2 Boiling Point
1,737.00 °C1,484.00 °C
Flerovium Metal
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
Gray
4.3.3 Luster
Metallic
NA
4.4 Hardness
4.4.1 Mohs Hardness
NA1.75
Cesium Metal
0.2 8.5
4.4.2 Brinell Hardness
NA170.00 MPa
Cesium Metal
0.14 3490
4.4.4 Vickers Hardness
NANA
Palladium Metal
121 3430
4.5 Speed of Sound
NA3,810.00 m/s
Thallium Metal
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
4.6.3 Reflectivity
NANA
Molybdenum Metal
58 97
4.7 Allotropes
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Ra
Ca
5.2 Isotopes
5.2.1 Known Isotopes
3319
Tennessine Metal
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
0.901.00
Francium Metal
0.7 2.54
5.3.3 Sanderson Electronegativity
NA0.95
Cesium Metal
0.22 2.56
5.3.6 Allred Rochow Electronegativity
0.971.04
Cesium Metal
0.86 1.82
5.3.8 Mulliken-Jaffe Electronegativity
0.921.08
Cesium Metal
0.62 2.48
5.3.10 Allen Electronegativity
0.891.03
Cesium Metal
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
3.103.00
Gold Metal
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
509.30 kJ/mol589.80 kJ/mol
Cesium Metal
375.7 26130
5.5.4 2nd Energy Level
979.00 kJ/mol1,145.40 kJ/mol
Ruthenium Metal
710.2162 28750
5.5.6 3rd Energy Level
NA4,912.40 kJ/mol
Osmium Metal
1600 34230
5.5.8 4th Energy Level
NA6,491.00 kJ/mol
Thorium Metal
2780 37066
5.5.10 5th Energy Level
NA8,153.00 kJ/mol
Dubnium Metal
4305.2 97510
5.6.1 6th Energy Level
NA10,496.00 kJ/mol
Seaborgium Metal
5715.8 105800
5.6.2 7th Energy level
NA12,270.00 kJ/mol
Bohrium Metal
7226.8 114300
5.7.1 8th Energy Level
NA14,206.00 kJ/mol
Hassium Metal
8857.4 125300
5.8.1 9th Energy Level
NA18,191.00 kJ/mol
Yttrium Metal
14110 134700
5.8.2 10th Energy Level
NA20,385.00 kJ/mol
Strontium Metal
17100 144300
5.8.3 11th Energy Level
NA57,110.00 kJ/mol
Yttrium Metal
19900 169988
5.8.4 12th Energy Level
NA63,410.00 kJ/mol
Molybdenum Metal
22219 189368
5.8.5 13th Energy Level
NA70,110.00 kJ/mol
Molybdenum Metal
26930 76015
5.8.6 14th Energy Level
NA78,890.00 kJ/mol
Molybdenum Metal
29196 86450
5.8.7 15th Energy Level
NA86,310.00 kJ/mol
Manganese Metal
41987 97510
5.8.8 16th Energy Level
NA94,000.00 kJ/mol
Iron Metal
47206 109480
5.8.9 17th Energy Level
NA104,900.00 kJ/mol
Cobalt Metal
52737 122200
5.8.10 18th Energy Level
NA111,711.00 kJ/mol
Nickel Metal
58570 134810
5.8.11 19th Energy Level
NANA
Copper Metal
64702 148700
5.8.12 20th Energy Level
NANA
Molybdenum Metal
80400 171200
5.8.13 21st Energy Level
NANA
Molybdenum Metal
87000 179100
5.8.14 22nd Energy Level
NANA
Molybdenum Metal
93400 184900
5.8.15 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
5.8.16 24th Energy Level
NANA
Molybdenum Metal
104400 195200
5.8.17 25th Energy Level
NANA
Molybdenum Metal
121900 121900
5.8.18 26th Energy Level
NANA
Molybdenum Metal
127700 127700
5.8.19 27th Energy Level
NANA
Molybdenum Metal
133800 133800
5.8.20 28th Energy Level
NANA
Molybdenum Metal
139800 139800
5.8.21 29th Energy Level
NANA
Molybdenum Metal
148100 148100
5.8.22 30th Energy Level
NANA
Molybdenum Metal
154500 154500
5.9 Electrochemical Equivalent
4.22 g/amp-hr0.75 g/amp-hr
Beryllium Metal
0.16812 8.3209
5.10 Electron Work Function
NA2.87 eV
Cesium Metal
2.14 5.65
5.11 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Chemical Stability, Flammability, Ionization, Solubility
6 Atomic
6.1 Atomic Number
8820
Lithium Metal
3 117
6.2 Electron Configuration
[Rn] 7s2
[Ar] 4s2
6.3 Crystal Structure
Body Centered Cubic (BCC)
Face Centered Cubic (FCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
8820
Lithium Metal
3 117
6.4.2 Number of Neutrons
13820
Lithium Metal
4 184
6.4.3 Number of Electrons
8820
Lithium Metal
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
NA197.00 pm
Beryllium Metal
112 265
6.5.2 Covalent Radius
221.00 pm176.00 pm
Beryllium Metal
96 260
6.5.3 Van der Waals Radius
283.00 pm231.00 pm
Zinc Metal
139 348
6.6 Atomic Weight
226.00 amu40.08 amu
Lithium Metal
6.94 294
6.7 Atomic Volume
45.20 cm3/mol29.90 cm3/mol
Manganese Metal
1.39 71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
20.10 (-eV)29.00 (-eV)
Francium Metal
8 392.42
6.10 Lattice Constant
514.80 pm558.84 pm
Beryllium Metal
228.58 891.25
6.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
6.12 Lattice C/A Ratio
NANA
Beryllium Metal
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
5.50 g/cm31.55 g/cm3
Lithium Metal
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
NA1.38 g/cm3
Lithium Metal
0.512 20
7.2 Tensile Strength
NANA
Indium Metal
2.5 11000
7.3 Viscosity
NANA
Mercury Metal
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
NA25.50 (Pa)
Cerium Metal
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
NANA
Tungsten Metal
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
NA7.40 GPa
Potassium Metal
1.3 222
7.5.2 Bulk Modulus
NA17.00 GPa
Cesium Metal
1.6 462
7.5.3 Young's Modulus
NA20.00 GPa
Cesium Metal
1.7 528
7.6 Poisson Ratio
NA0.31
Beryllium Metal
0.032 0.47
7.7 Other Mechanical Properties
NA
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
5.004.58
Lithium Metal
0.53 4500
8.1.2 Magnetic Ordering
Nonmagnetic
Diamagnetic
8.1.3 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
8.1.4 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
NA
Conductor
8.2.2 Resistivity
100.00 nΩ·m33.60 nΩ·m
Thallium Metal
0.18 961
8.2.3 Electrical Conductivity
NA0.30 106/cm Ω
Plutonium Metal
0.00666 0.63
8.2.4 Electron Affinity
NA2.37 kJ/mol
Mercury Metal
0 222.8
9 Thermal
9.1 Specific Heat
0.12 J/(kg K)0.63 J/(kg K)
Americium Metal
0.11 3.6
9.2 Molar Heat Capacity
NA25.93 J/mol·K
Beryllium Metal
16.443 62.7
9.3 Thermal Conductivity
18.60 W/m·K201.00 W/m·K
Neptunium Metal
6.3 429
9.4 Critical Temperature
NANA
Ytterbium Metal
26.3 3223
9.5 Thermal Expansion
NA22.30 µm/(m·K)
Tungsten Metal
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
NA150.00 kJ/mol
Zinc Metal
7.32 799.1
9.6.2 Enthalpy of Fusion
NA8.54 kJ/mol
Cesium Metal
2.1 35.23
9.6.3 Enthalpy of Atomization
163.00 kJ/mol184.00 kJ/mol
Mercury Metal
61.5 837
9.7 Standard Molar Entropy
71.00 J/mol.K41.60 J/mol.K
Beryllium Metal
9.5 198.1