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Actinium
Actinium

Radium
Radium



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Actinium
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Actinium vs Radium

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1 Periodic Table
1.1 Symbol
Ac
Ra
1.2 Group Number
NA2
Gadolinium
0 17
1.3 Period Number
77
Lithium
2 7
1.3 Block
f block
s block
1.4 Element Family
Actinide
Alkaline Earth
1.5 CAS Number
74403487440144
Aluminium
7429905 54386242
1.7 Space Group Name
Fm_ 3m
Im_ 3m
1.8 Space Group Number
225.00229.00
Plutonium
11 229
2 Facts
2.1 Interesting Facts
Not Available
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
2.2 Sources
Obtained by Treating Radium with Neutrons, Ores of metals
Mining, Ores of metals
2.3 History
2.3.1 Who Discovered
Friedrich Oskar Giesel
Not Available
2.3.2 Discovery
In 1902
In 1898
2.4 Abundance
2.4.1 Abundance In Universe
NANA
Thallium
5E-09 0.11
2.4.2 Abundance In Sun
~-9999 %~-9999 %
Beryllium
1E-08 0.1
2.6.1 Abundance In Meteorites
NANA
Gold
1.7E-07 22
3.4.2 Abundance In Earth's Crust
NA0.00 %
Palladium
9.9E-12 8.1
3.4.4 Abundance In Oceans
NA0.00 %
Protactinium
2E-23 1.1
3.4.6 Abundance In Humans
NA0.00 %
Tin
1E-13 1.4
4 Uses
4.1 Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
4.1.1 Industrial Uses
NA
NA
4.1.2 Medical Uses
NA
Pharmaceutical Industry
4.1.3 Other Uses
Alloys, Nuclear Research, Research Purposes
NA
4.2 Biological Properties
4.2.1 Toxicity
Toxic
Highly Toxic
4.2.2 Present in Human Body
4.2.3 In Blood
0.00 Blood/mg dm-3NA
Plutonium
0 1970
4.2.5 In Bone
0.00 p.p.m.NA
Plutonium
0 170000
5 Physical
5.1 Melting Point
1,227.00 °C700.00 °C
Francium
27 3410
5.2 Boiling Point
3,200.00 °C1,737.00 °C
Flerovium
147 5660
6.3 Appearance
6.3.1 Physical State
Solid
Solid
6.3.2 Color
Silvery White
Silvery White
6.3.3 Luster
NA
Metallic
6.4 Hardness
6.4.1 Mohs Hardness
NANA
Cesium
0.2 8.5
6.4.3 Brinell Hardness
NANA
Cesium
0.14 3490
7.1.1 Vickers Hardness
NANA
Palladium
121 3430
7.3 Speed of Sound
NANA
Thallium
818 16200
7.6 Optical Properties
7.6.1 Refractive Index
NANA
Mercury
1.000933 1.7229
7.6.2 Reflectivity
NANA
Molybdenum
58 97
7.7 Allotropes
7.7.1 α Allotropes
Not Available
Not Available
7.7.2 β Allotropes
Not Available
Not Available
7.7.3 γ Allotropes
Not Available
Not Available
8 Chemical
8.1 Chemical Formula
Ac
Ra
8.2 Isotopes
8.2.1 Known Isotopes
2933
Tennessine
0 38
8.3 Electronegativity
8.3.1 Pauling Electronegativity
1.100.90
Francium
0.7 2.54
8.3.2 Sanderson Electronegativity
NANA
Cesium
0.22 2.56
8.4.1 Allred Rochow Electronegativity
1.000.97
Cesium
0.86 1.82
8.5.2 Mulliken-Jaffe Electronegativity
NA0.92
Cesium
0.62 2.48
8.5.4 Allen Electronegativity
NA0.89
Cesium
0.659 2.7
9.3 Electropositivity
9.3.1 Pauling Electropositivity
2.903.10
Gold
1.46 3.3
9.5 Ionization Energies
9.5.1 1st Energy Level
499.00 kJ/mol509.30 kJ/mol
Cesium
375.7 26130
9.5.3 2nd Energy Level
1,170.00 kJ/mol979.00 kJ/mol
Ruthenium
710.2162 28750
9.5.4 3rd Energy Level
1,900.00 kJ/molNA
Osmium
1600 34230
9.5.6 4th Energy Level
4,700.00 kJ/molNA
Thorium
2780 37066
9.5.8 5th Energy Level
NANA
Dubnium
4305.2 97510
9.5.10 6th Energy Level
NANA
Seaborgium
5715.8 105800
9.6.2 7th Energy level
NANA
Bohrium
7226.8 114300
9.7.2 8th Energy Level
NANA
Hassium
8857.4 125300
9.7.4 9th Energy Level
NANA
Yttrium
14110 134700
9.7.5 10th Energy Level
NANA
Strontium
17100 144300
9.7.7 11th Energy Level
NANA
Yttrium
19900 169988
9.7.9 12th Energy Level
NANA
Molybdenum
22219 189368
9.7.11 13th Energy Level
NANA
Molybdenum
26930 76015
9.7.14 14th Energy Level
NANA
Molybdenum
29196 86450
9.7.16 15th Energy Level
NANA
Manganese
41987 97510
9.7.18 16th Energy Level
NANA
Iron
47206 109480
9.7.20 17th Energy Level
NANA
Cobalt
52737 122200
9.7.21 18th Energy Level
NANA
Nickel
58570 134810
9.7.24 19th Energy Level
NANA
Copper
64702 148700
9.7.26 20th Energy Level
NANA
Molybdenum
80400 171200
9.7.28 21st Energy Level
NANA
Molybdenum
87000 179100
9.7.30 22nd Energy Level
NANA
Molybdenum
93400 184900
9.7.33 23rd Energy Level
NANA
Molybdenum
98420 198800
9.7.34 24th Energy Level
NANA
Molybdenum
104400 195200
9.7.36 25th Energy Level
NANA
Molybdenum
121900 121900
9.7.38 26th Energy Level
NANA
Molybdenum
127700 127700
9.7.40 27th Energy Level
NANA
Molybdenum
133800 133800
9.7.41 28th Energy Level
NANA
Molybdenum
139800 139800
9.7.43 29th Energy Level
NANA
Molybdenum
148100 148100
9.7.45 30th Energy Level
NANA
Molybdenum
154500 154500
9.8 Electrochemical Equivalent
2.82 g/amp-hr4.22 g/amp-hr
Beryllium
0.16812 8.3209
9.9 Electron Work Function
NANA
Cesium
2.14 5.65
9.10 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Radioactivity
10 Atomic
10.1 Atomic Number
8988
Lithium
3 117
10.2 Electron Configuration
[Rn] 6d1 7s2
[Rn] 7s2
10.3 Crystal Structure
Face Centered Cubic (FCC)
Body Centered Cubic (BCC)
10.3.1 Crystal Lattice
10.4 Atom
10.4.1 Number of Protons
8988
Lithium
3 117
10.4.3 Number of Neutrons
138138
Lithium
4 184
10.5.1 Number of Electrons
8988
Lithium
3 117
10.6 Radius of an Atom
10.6.1 Atomic Radius
195.00 pmNA
Beryllium
112 265
10.7.1 Covalent Radius
NA221.00 pm
Beryllium
96 260
11.1.1 Van der Waals Radius
NA283.00 pm
Zinc
139 348
11.3 Atomic Weight
227.00 amu226.00 amu
Lithium
6.94 294
11.6 Atomic Volume
22.54 cm3/mol45.20 cm3/mol
Manganese
1.39 71.07
11.7 Adjacent Atomic Numbers
11.7.1 Previous Element
11.7.2 Next Element
11.8 Valence Electron Potential
38.60 (-eV)20.10 (-eV)
Francium
8 392.42
11.9 Lattice Constant
567.00 pm514.80 pm
Beryllium
228.58 891.25
11.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
11.12 Lattice C/A Ratio
NANA
Beryllium
1.567 1.886
12 Mechanical
12.1 Density
12.1.1 Density At Room Temperature
10.00 g/cm35.50 g/cm3
Lithium
0.534 40.7
12.1.3 Density When Liquid (at m.p.)
NANA
Lithium
0.512 20
12.3 Tensile Strength
NANA
Indium
2.5 11000
12.5 Viscosity
NANA
Mercury
0.001526 0.001526
12.6 Vapor Pressure
12.6.1 Vapor Pressure at 1000 K
NANA
Cerium
2.47E-11 121
12.8.1 Vapor Pressure at 2000 K
NANA
Tungsten
2.62E-10 774
12.10 Elasticity properties
12.10.1 Shear Modulus
NANA
Potassium
1.3 222
12.12.1 Bulk Modulus
NANA
Cesium
1.6 462
13.1.2 Young's Modulus
NANA
Cesium
1.7 528
13.2 Poisson Ratio
NANA
Beryllium
0.032 0.47
13.4 Other Mechanical Properties
NA
NA
14 Magnetic
14.1 Magnetic Characteristics
14.1.1 Specific Gravity
10.075.00
Lithium
0.53 4500
14.2.1 Magnetic Ordering
Paramagnetic
Nonmagnetic
14.2.2 Permeability
NANA
Bismuth
1.25643E-06 0.0063
14.3.2 Susceptibility
NANA
Bismuth
-0.000166 200000
14.4 Electrical Properties
14.4.1 Electrical Property
Unknown
NA
14.4.2 Resistivity
NA100.00 nΩ·m
Thallium
0.18 961
14.5.2 Electrical Conductivity
NANA
Plutonium
0.00666 0.63
14.5.4 Electron Affinity
NANA
Mercury
0 222.8
15 Thermal
15.1 Specific Heat
0.12 J/(kg K)0.12 J/(kg K)
Americium
0.11 3.6
15.2 Molar Heat Capacity
27.20 J/mol·KNA
Beryllium
16.443 62.7
15.4 Thermal Conductivity
12.00 W/m·K18.60 W/m·K
Neptunium
6.3 429
16.2 Critical Temperature
NANA
Ytterbium
26.3 3223
16.3 Thermal Expansion
NANA
Tungsten
4.5 97
16.5 Enthalpy
16.5.1 Enthalpy of Vaporization
NANA
Zinc
7.32 799.1
16.5.3 Enthalpy of Fusion
NANA
Cesium
2.1 35.23
16.5.5 Enthalpy of Atomization
301.00 kJ/mol163.00 kJ/mol
Mercury
61.5 837
16.6 Standard Molar Entropy
56.50 J/mol.K71.00 J/mol.K
Beryllium
9.5 198.1