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Protactinium
Protactinium

Strontium
Strontium



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Protactinium
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Strontium

Protactinium Strontium Comparison

1 Periodic Table
1.1 Symbol
Pa
Sr
1.2 Group Number
NA2
Gadolinium Metal
0 17
1.5 Period Number
75
Lithium Metal
2 7
1.7 Block
f block
s block
1.8 Element Family
Actinide
Alkaline Earth
1.9 CAS Number
74401337440246
Aluminium Metal
7429905 54386242
1.5 Space Group Name
I4/mmm
Fm_ 3m
1.6 Space Group Number
139.00225.00
Plutonium Metal
11 229
2 Facts
2.1 Interesting Facts
  • Protactinium metal has 29 isotopes.
  • Isotopes of Protactinium-231 used in nuclear weapon.
  • Strontium element is softer than Calcium.
  • Silvery Strontium turns yellow, if exposed to air.
2.2 Sources
Found in Uranium Ores, Mining, Ores of metals
Found in Minerals, Mining, Ores of Minerals
2.3 History
2.3.2 Who Discovered
William Crookes
William Cruickshank
2.3.3 Discovery
In 1900
In 1787
2.4 Abundance
2.4.1 Abundance In Universe
NA4 * 10-6 %
Thallium Metal
5E-09 0.11
2.5.2 Abundance In Sun
~-9999 %~0.000005 %
Beryllium Metal
1E-08 0.1
2.12.2 Abundance In Meteorites
NA0.00 %
Gold Metal
1.7E-07 22
2.20.2 Abundance In Earth's Crust
0.00 %0.04 %
Radium Metal
9.9E-12 8.1
3.6.4 Abundance In Oceans
0.00 %0.00 %
Tin
2E-23 1.1
4.4.2 Abundance In Humans
NA0.00 %
Radium Metal
1E-13 1.4
5 Uses
5.1 Uses & Benefits
  • Currently known uses of Protactinium metal are limited to research purpose only.
  • 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.
5.1.1 Industrial Uses
NA
Ammunition Industry, Chemical Industry
5.1.2 Medical Uses
NA
NA
5.1.4 Other Uses
NA
Alloys
5.2 Biological Properties
5.2.1 Toxicity
Highly Toxic
Non Toxic
5.2.2 Present in Human Body
5.2.4 In Blood
0.00 Blood/mg dm-30.03 Blood/mg dm-3
Plutonium Metal
0 1970
5.3.3 In Bone
0.00 p.p.m.140.00 p.p.m.
Plutonium Metal
0 170000
6 Physical
6.1 Melting Point
1,568.00 °C769.00 °C
Francium Metal
27 3410
6.2 Boiling Point
4,027.00 °C1,384.00 °C
Flerovium Metal
147 5660
6.3 Appearance
6.3.1 Physical State
Solid
Solid
6.3.3 Color
Silver
Silvery White
6.3.4 Luster
Metallic
Metallic
6.4 Hardness
6.4.1 Mohs Hardness
NA1.50
Cesium Metal
0.2 8.5
7.2.4 Brinell Hardness
NANA
Cesium Metal
0.14 3490
7.2.7 Vickers Hardness
NANA
Palladium Metal
121 3430
8.3 Speed of Sound
NANA
Thallium Metal
818 16200
8.4 Optical Properties
8.4.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
9.1.1 Reflectivity
NANA
Molybdenum Metal
58 97
9.2 Allotropes
9.2.1 α Allotropes
Not Available
Not Available
9.2.2 β Allotropes
Not Available
Not Available
9.2.3 γ Allotropes
Not Available
Not Available
10 Chemical
10.1 Chemical Formula
Pa
Sr
10.2 Isotopes
10.2.1 Known Isotopes
2727
Tennessine Metal
0 38
10.3 Electronegativity
10.3.1 Pauling Electronegativity
1.500.95
Francium Metal
0.7 2.54
11.2.1 Sanderson Electronegativity
NA0.72
Cesium Metal
0.22 2.56
11.2.5 Allred Rochow Electronegativity
1.140.99
Cesium Metal
0.86 1.82
11.3.1 Mulliken-Jaffe Electronegativity
NA1.00
Cesium Metal
0.62 2.48
11.5.2 Allen Electronegativity
NA0.96
Cesium Metal
0.659 2.7
11.6 Electropositivity
11.6.1 Pauling Electropositivity
2.503.05
Gold Metal
1.46 3.3
11.9 Ionization Energies
11.9.1 1st Energy Level
568.00 kJ/mol549.50 kJ/mol
Cesium Metal
375.7 26130
11.9.5 2nd Energy Level
1,128.00 kJ/mol1,064.20 kJ/mol
Ruthenium Metal
710.2162 28750
11.9.7 3rd Energy Level
1,814.00 kJ/mol4,138.00 kJ/mol
Osmium Metal
1600 34230
11.10.2 4th Energy Level
2,991.00 kJ/mol5,500.00 kJ/mol
Thorium Metal
2780 37066
11.11.1 5th Energy Level
NA6,910.00 kJ/mol
Dubnium Metal
4305.2 97510
11.11.2 6th Energy Level
NA8,760.00 kJ/mol
Seaborgium Metal
5715.8 105800
11.13.1 7th Energy level
NA10,230.00 kJ/mol
Bohrium Metal
7226.8 114300
11.13.3 8th Energy Level
NA11,800.00 kJ/mol
Hassium Metal
8857.4 125300
11.13.4 9th Energy Level
NA15,600.00 kJ/mol
Yttrium Metal
14110 134700
11.14.2 10th Energy Level
NA17,100.00 kJ/mol
Copper
17100 144300
11.15.2 11th Energy Level
NA31,270.00 kJ/mol
Yttrium Metal
19900 169988
11.15.4 12th Energy Level
NANA
Molybdenum Metal
22219 189368
11.16.2 13th Energy Level
NANA
Molybdenum Metal
26930 76015
12.2.2 14th Energy Level
NANA
Molybdenum Metal
29196 86450
12.2.5 15th Energy Level
NANA
Manganese Metal
41987 97510
12.3.3 16th Energy Level
NANA
Iron Metal
47206 109480
13.3.3 17th Energy Level
NANA
Cobalt Metal
52737 122200
13.3.4 18th Energy Level
NANA
Nickel Metal
58570 134810
13.3.5 19th Energy Level
NANA
Copper Metal
64702 148700
13.4.2 20th Energy Level
NANA
Molybdenum Metal
80400 171200
13.4.3 21st Energy Level
NANA
Molybdenum Metal
87000 179100
13.4.5 22nd Energy Level
NANA
Molybdenum Metal
93400 184900
13.4.6 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
13.4.10 24th Energy Level
NANA
Molybdenum Metal
104400 195200
13.4.11 25th Energy Level
NANA
Molybdenum Metal
121900 121900
13.4.13 26th Energy Level
NANA
Molybdenum Metal
127700 127700
13.4.15 27th Energy Level
NANA
Molybdenum Metal
133800 133800
13.4.17 28th Energy Level
NANA
Molybdenum Metal
139800 139800
13.4.19 29th Energy Level
NANA
Molybdenum Metal
148100 148100
13.4.21 30th Energy Level
NANA
Molybdenum Metal
154500 154500
13.5 Electrochemical Equivalent
1.72 g/amp-hr1.64 g/amp-hr
Beryllium Metal
0.16812 8.3209
13.6 Electron Work Function
NA2.59 eV
Cesium Metal
2.14 5.65
13.8 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity
Ionization, Radioactive Isotopes, Radioactivity, Solubility
14 Atomic
14.1 Atomic Number
9138
Lithium Metal
3 117
14.2 Electron Configuration
[Rn] 5f2 6d1 7s2
[Kr] 5s2
14.3 Crystal Structure
Tetragonal (TETR)
Face Centered Cubic (FCC)
14.3.1 Crystal Lattice
14.4 Atom
14.4.1 Number of Protons
9138
Lithium Metal
3 117
14.6.2 Number of Neutrons
12250
Lithium Metal
4 184
14.6.5 Number of Electrons
9138
Lithium Metal
3 117
14.8 Radius of an Atom
14.8.1 Atomic Radius
163.00 pm215.00 pm
Beryllium Metal
112 265
14.8.2 Covalent Radius
200.00 pm195.00 pm
Beryllium Metal
96 260
14.8.5 Van der Waals Radius
243.00 pm249.00 pm
Zinc Metal
139 348
1.2 Atomic Weight
231.04 amu87.62 amu
Lithium Metal
6.94 294
1.4 Atomic Volume
15.00 cm3/mol33.70 cm3/mol
Manganese Metal
1.39 71.07
1.6 Adjacent Atomic Numbers
1.6.1 Previous Element
1.6.2 Next Element
1.7 Valence Electron Potential
92.00 (-eV)25.70 (-eV)
Francium Metal
8 392.42
1.11 Lattice Constant
392.50 pm608.49 pm
Beryllium Metal
228.58 891.25
1.12 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
1.13 Lattice C/A Ratio
NANA
Beryllium Metal
1.567 1.886
2 Mechanical
2.1 Density
2.1.1 Density At Room Temperature
15.37 g/cm32.64 g/cm3
Lithium Metal
0.534 40.7
2.2.2 Density When Liquid (at m.p.)
NA2.38 g/cm3
Lithium Metal
0.512 20
2.4 Tensile Strength
NANA
Indium Metal
2.5 11000
2.5 Viscosity
NANA
Mercury Metal
0.001526 0.001526
2.7 Vapor Pressure
2.7.1 Vapor Pressure at 1000 K
NA121.00 (Pa)
Cerium Metal
2.47E-11 121
2.7.5 Vapor Pressure at 2000 K
NANA
Tungsten Metal
2.62E-10 774
2.9 Elasticity properties
2.9.1 Shear Modulus
NA6.03 GPa
Potassium Metal
1.3 222
2.9.4 Bulk Modulus
NANA
Cesium Metal
1.6 462
2.9.6 Young's Modulus
NA15.70 GPa
Cesium Metal
1.7 528
2.10 Poisson Ratio
NA0.28
Beryllium Metal
0.032 0.47
2.11 Other Mechanical Properties
Unknown
NA
3 Magnetic
3.1 Magnetic Characteristics
3.1.1 Specific Gravity
15.372.64
Lithium Metal
0.53 4500
3.1.3 Magnetic Ordering
Paramagnetic
Paramagnetic
3.1.4 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
3.1.5 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
3.2 Electrical Properties
3.2.1 Electrical Property
Conductor
NA
3.2.2 Resistivity
177.00 nΩ·m132.00 nΩ·m
Thallium Metal
0.18 961
3.2.4 Electrical Conductivity
0.05 106/cm Ω0.08 106/cm Ω
Plutonium Metal
0.00666 0.63
3.2.6 Electron Affinity
NA5.03 kJ/mol
Mercury Metal
0 222.8
4 Thermal
4.1 Specific Heat
0.12 J/(kg K)0.30 J/(kg K)
Americium Metal
0.11 3.6
4.2 Molar Heat Capacity
NA26.40 J/mol·K
Beryllium Metal
16.443 62.7
4.3 Thermal Conductivity
47.00 W/m·K35.40 W/m·K
Neptunium Metal
6.3 429
4.4 Critical Temperature
NANA
Ytterbium Metal
26.3 3223
4.5 Thermal Expansion
9.90 µm/(m·K)22.50 µm/(m·K)
Tungsten Metal
4.5 97
4.6 Enthalpy
4.6.1 Enthalpy of Vaporization
NA150.00 kJ/mol
Zinc Metal
7.32 799.1
4.6.3 Enthalpy of Fusion
12.34 kJ/mol9.16 kJ/mol
Cesium Metal
2.1 35.23
4.6.6 Enthalpy of Atomization
NA163.20 kJ/mol
Mercury Metal
61.5 837
4.7 Standard Molar Entropy
198.10 J/mol.K55.00 J/mol.K
Beryllium Metal
9.5 198.1