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What is Protactinium?

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Periodic table of chemical elements is an arrangement of elements in the form of rows (period) and columns (Group). They are arranged with respect to their atomic numbers and similar characteristics. Protactinium In Periodic Table </>
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It’s an atomic symbol of Protactinium which helps identifying it in periodic table. Symbol
Pa
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Group number of Metals is vertical column number in periodic table. Group Number
Not Available
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Period number is a horizontal row number of Metals in periodic table. Period Number
7
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Periodic table is subdivided into 4 blocks i.e p-block, d-block, s-block and f-block. Block
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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
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Metals belongs to the subcategory of periodic table. Different element families exist in this table. For example, Alkali metals, Transition metals, alkaline earth metals, post-transition metals, Lanthanide & Actinide series metals. Element Family
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Total 15 metals are included in actinide series, from Actinium to Lawrencium. Actinide series is located under f and d block of the periodic table.Actinide
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The Chemical Abstract Service (CAS) is part of the American Chemical Society and maintains a database of chemical compounds and sequences. and each element has its unique identification number known as CAS number. CAS Number
7440133
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66
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The crystallographic or Fedorov groups, and represent a description of the symmetry of the crystal. Space Group Name
I4/mmm
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The crystallographic or Fedorov groups, and represent a description of thesymmetry of the crystal. Space Group Number
139.00
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8
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Want to know Interesting and lesser known facts about Protactinium, then you are at the right place. Facts about Protactinium </>
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Bunch of Interesting facts about Protactinium. Interesting Facts
  • Protactinium metal has 29 isotopes.
  • Isotopes of Protactinium-231 used in nuclear weapon.
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List of different sources of Protactinium. Sources
  • Found in Uranium Ores
  • Mining
  • Ores of metals
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Lets check out the facts about history of Protactinium. History of Protactinium
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You might be wondering who discovered Protactinium metal? Who Discovered Protactinium
William Crookes
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Protactinium metal’s discovery period. Because we think most of the metals are discovered by our ant-sisters but is it really true? Let’s Find out then! Discovery
In 1900
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Abundance percentage of Protactinium metal at various places. This will give you an idea about its Abundance levels. Abundance of Protactinium
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Abundance percentage of Protactinium in Earth’s Crust. Abundance In Earth’s Crust
0.00 %
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57
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Abundance percentage of Protactinium in Oceans. Abundance In Oceans
0.00 %
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47
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Different types of Protactinium Uses and benefits are listed down below. Uses of Protactinium </>
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Uses & Benefits Uses & Benefits
  • Currently known uses of Protactinium metal are limited to research purpose only.
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List of industrial uses of Protactinium. Industrial Uses
NA
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List of medical uses of Protactinium. Medical Uses
NA
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List of lesser known uses of Protactinium metal. Other Uses
NA
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Biological properties of Protactinium. Biological Properties
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Toxicity level of Protactinium metal. Toxicity
Highly Toxic
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Whether Protactinium metal is present in the Human Body? Present in Human Body
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What amount of Protactinium is present in human blood normally? In Blood
0.00 Blood/mg dm-3
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37
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What amount of Protactinium is present in human bone normally? In Bone
0.00 p.p.m.
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36
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Physical properties or characteristics of Protactinium. These properties are mostly related to its appearance and surface. Physical Properties of Protactinium </>
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The temperature at which Metals metal starts melting. Melting Point
1,568.00 °C
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21
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The temperature at which Metals starts boiling. Not literally it is a temperature point at which it converts to vapors. Boiling Point
4,027.00 °C
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12
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Physical appearance or look and feel of Protactinium is described here. Appearance of Protactinium
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Physical state or phase of Protactinium at room temperature. Physical State
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At room temperature almost all metal are found in solid physical sate but only the mercury element found in liquid state.Solid
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One might wonder, what is the exact color of Protactinium metal in nature? Color
Silver
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Metals generally exhibit a metallic luster! Lets check out the look and feel of Protactinium metal. Luster
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Metals are hard/soft and have different type of luster. Here we present you a list metals and these metals exhibit metallic luster.Metallic
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Hardness of Protactinium which measures how resistant this metals is to various kinds of permanent shape change when a compressive force is applied. Hardness of Protactinium
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The speed of sound is the distance traveled per unit time by a sound wave propagating through an elastic medium. Speed of Sound
Not Available
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Optical properties related to refractive index & the reflectivity parameters of Protactinium. Optical Properties
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Allotropes are different structural modifications of an metals; the atoms of the metals are bonded together with the help of different crystal structure. Allotropes
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There are usually 3 tyopes of allotropes, out of these alpha allotropes of this metal are listed here. α Allotropes
Not Available
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There are usually 3 tyopes of allotropes, out of these beta allotropes of this metal are listed here. β Allotropes
Not Available
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There are usually 3 tyopes of allotropes, out of these gamma allotropes of this metal are listed here. γ Allotropes
Not Available
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Chemical properties or characteristics of Protactinium are listed here. Chemical Properties of Protactinium </>
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Chemical formula or atomic symbol of Protactinium. This symbol is very useful while mentioning chemical reactions and equations of this metals. Chemical Formula
Pa
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Isotopes of Protactinium are its variants, which differ in neutron number present in the nucleus. Isotopes of Protactinium
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The total number of known Isotopes of this metal. Known Isotopes
27
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12
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Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. Electronegativity
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Pauling Electronegativity is very popular scale to measure Electronegativity of metals. Pauling Electronegativity
1.50
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27
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Allred Rochow Electronegativity is very famous scale to measure Electronegativity. Allred Rochow Electronegativity
1.14
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28
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Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. Opposite of that is known as Electropositivity. Electropositivity
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Pauling Electropositivity is scale used to mesure Electropositivity of Protactinium. Pauling Electropositivity
2.50
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27
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The ionization energy (IE) or the ionization potential is qualitatively defined as the amount of energy required to remove the most loosely bound electron of an isolated gaseous atom to form a cation. Ionization Energies
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1st energy level of Protactinium. 1st Energy Level
568.00 kJ/mol
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68
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2nd energy level of Protactinium. 2nd Energy Level
1,128.00 kJ/mol
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72
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3rd energy level of Protactinium. 3rd Energy Level
1,814.00 kJ/mol
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81
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4th energy level of Protactinium. 4th Energy Level
2,991.00 kJ/mol
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66
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The electrochemical equivalent of a Protactinium element is the mass of this element (in grams) transported by 1 coulomb of electricity. The electrochemical equivalent of an element is measured with a voltameter. Electrochemical Equivalent
1.72 g/amp-hr
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43
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Electron work function of Protactinium is the minimum thermodynamic work (i.e. energy) needed to remove an electron from a solid to a point in the vacuum immediately outside the solid surface. Electron Work Function
Not Available
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List of all chemical properties/characteristics/behavior of Protactinium. Other Chemical Properties
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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, 
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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, 
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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
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Detailed information about the atomic structure of Protactinium. Atomic Properties of Protactinium </>
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Atomic number of Metals is the number of protons present in the atom of Metals metal. Atomic Number
91
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27
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The electron configuration of Protactinium is the distribution of its electrons in atom or molecule in atomic or molecular orbitals. Electron Configuration
[Rn] 5f2 6d1 7s2
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In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. There are different types of Crystal structure exhibited by metals. Crystal Structure
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The tetragonal crystal structure occur as a result of stretching a cubic lattice along one of its lattice vectors due to which cube becomes a rectangular prism with a square shape at base.Tetragonal (TETR)
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Images of crystal lattice of Protactinium. It is a symmetrical three-dimensional arrangement of atoms inside a crystal. Crystal Lattice
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Information about number of Electrons, protons and neutrons present inside the atom of Protactinium Metal. Atom of Protactinium
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Number of protons present in the nucleus of Protactinium. Number of Protons
91
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27
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Number of neutrons present in the nucleus of Protactinium. Number of Neutrons
122
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22
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Number of Electrons present inside the atom of Protactinium. Number of Electrons
91
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27
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Radius of an Atom of Protactinium. Different radius measures are listed below. Radius of an Atom
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The atomic radius of Protactinium can be defined as a measure of the size of its atoms. Atomic Radius
163.00 pm
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25
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The covalent radius of Protactinium can be defined as a measure of the size of its atoms. Covalent Radius
200.00 pm
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11
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The Van der Waals Radius of Protactinium can be defined as a measure of the size of its atoms. Van der Waals Radius
243.00 pm
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11
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The atomic weight is the average of the isotope weights weighted for the isotope distribution and expressed on the 12C scale. Atomic Weight
231.04 amu
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24
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Atomic Volume of Protactinium means volume of its atoms. Atomic Volume
15.00 cm3/mol
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34
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It will let know the previous and next atomic number of Protactinium. Adjacent Atomic Numbers
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Previous atomic number metal. For eg. If the atomic number of Gold is 79 then the previous atomic number belongs to Platinum which is 78. Previous Element
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Next atomic number metal. For eg. if the atomic number of Gold is 79 then the next atomic number belongs to Mercury which is 80. Next Element
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The valence electron is an electron that is associated with an atom, and that can participate in the formation of a chemical bond. Valence Electron Potential
92.00 (-eV)
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11
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The lattice constant, or lattice parameter, refers to the physical dimension of unit cells in a crystal lattice. Lattice Constant
392.50 pm
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23
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The lengths of the edges of a unit cell and the angles between them are called the Lattice angle. Lattice Angles
π/2, π/2, π/2
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It’s a ratio of Lattice constant by Lattice angle. Lattice C/A Ratio
Not Available
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List of different mechanical properties of Protactinium metal. These properties test the mechanical strength of this metal. Mechanical Properties of Protactinium </>
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The density of Protactinium metal is a relationship between the mass of the Protactinium atom and how much space it takes up (volume). Density of Protactinium
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Protactinium density at room temperature. Density At Room Temperature
15.37 g/cm3
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20
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Tensile strength is a measurement of the force required to pull something such as rope, wire, or a structural beam to the point where it breaks. Tensile Strength
Not Available
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The viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress. Viscosity
Not Available
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Vapor pressure or equilibrium vapor pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system. Vapor Pressure of Protactinium
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How much it will compress under a given amount of external pressure, that can be found with the help of its elasticity modulus. Elasticity properties
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Poisson’s ratio, named after Siméon Poisson, is the negative ratio of transverse to axial strain. Poisson Ratio
Not Available
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Whether Protactinium exhibits properties like ductility , malleability, weldability, sectility, etc. Other Mechanical Properties
Unknown
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List of different magnetic properties and characteristics of Protactinium. Magnetic Properties of Protactinium </>
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Different Magnetic significance of Protactinium. Magnetic Characteristics of Protactinium
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Specific gravity is the ratio of the density of a substance to the density of a reference substance. Specific Gravity
15.37
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12
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Magnetic Ordering of Protactinium defines its magnetic orientation (nature) and magnetic type. Magnetic Ordering
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Paramagnetic metals are slightly attracted by magnet, but they can’t retain the magnetic effect once they are removed from the magnetic field.Paramagnetic
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List of different electrical properties and significance of Protactinium. Electrical Properties
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Electrical property or nature of Protactinium defines its electrical orientation and electrical type. Electrical Property
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Conductor metals have very low resistance to electric currents. They can easily conduct electric current through them.Conductor
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Electrical resistivity (also known as resistivity, specific electrical resistance, or volume resistivity) is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current. Resistivity
177.00 nΩ·m
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21
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Electrical conductivity is the measure of a material’s ability to accommodate the transport of an electric charge. Electrical Conductivity
0.05 106/cm Ω
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34
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Thermal characteristic and the concepts thermodynamics of Protactinium. Thermal Properties of Protactinium </>
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The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius. Specific Heat
0.12 J/(kg K)
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40
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The molar heat capacity is the heat capacity per unit amount (SI unit: mole) of a pure substance. Molar Heat Capacity
Not Available
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Thermal conductivity (often denoted k, λ, or κ) is the property of a material to conduct heat. Thermal Conductivity
47.00 W/m·K
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32
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The critical temperature of a substance is the temperature at and above which vapor of the substance cannot be liquefied, no matter how much pressure is applied. Critical Temperature
Not Available
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Thermal expansion is the tendency of matter to change in shape, area, and volume in response to a change in temperature, through heat transfer. Thermal Expansion
9.90 µm/(m·K)
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40
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Enthalpy is the sum of the internal energy and the product of pressure and volume given by the equation. Enthalpy of Protactinium
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The enthalpy of fusion also known as (latent) heat of fusion is the change in enthalpy resulting from heating a given quantity of a substance to change its state from a solid to a liquid. The temperature at which this occurs is the melting point. Enthalpy of Fusion
12.34 kJ/mol
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28
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The standard molar entropy is the entropy content of one mole of substance, under standard conditions (not standard temperature and pressure). Standard Molar Entropy
198.10 J/mol.K
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1
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Protactinium Metal

Metals have been an inseparable component of major civilizations since centuries. Although metals were utilized since time unknown, researchers put considerable efforts in giving them appropriate names and defining their different properties and characteristics. This nomenclature process helped in arranging these metals in a well-organized fashion, known as the periodic table. In this periodic table, Protactinium metal is also represented by the symbol Pa. This atomic symbol of Protactinium is useful in indicating the position of metal Pa in the periodic table. If you are curious-headed or a science-geek, the common questions about metals are What is Protactinium? What are its physical, chemical, mechanical, electrical and thermal properties? Find all the relevant facts about Pa metals in the following sections.

Periodic Table of Protactinium

Periodic table of Protactinium comments over its position in the periodic table, on the basis of parameters like group number, period row, atomic number and orbital block. The metals which have electrons falling in the same sub-shell are grouped under the same block corresponding to its respective orbital. Protactinium metal belongs to Actinide Series category of the periodic table. Metals down a group have same valency while metals across a period have the same number of shells. Its group number (column number) is Not Available, whereas its period number is 7. It is placed under f block of the periodic table & is one of the prominent f block elements.

Protactinium Metal Properties

Metals have certain properties by which they can be distinguished from one another. Magnetic and Atomic Structure of Protactinium are few widely searched properties. Using the comparison facility, you can not only view the individual metal properties, but also compare the properties of multiple metals to get a thorough comparative analysis between the metals of your choice. Atomic number is a basic building block for the arrangement of metals in the periodic table. Atomic number of Protactinium is 91 and its atomic weight is 231.04 amu. The electrons in its atom are arranged in orbitals as [Rn] 5f2 6d1 7s2. Nuclear particles in Protactinium atom are 122 neutrons, 91 protons and 91 electrons.

Physical and Chemical Characteristics of Protactinium

Physical and chemical characteristics of Protactinium are two major criteria while comparing this metal with other metals. Physical Properties of Protactinium include its external appearance, shininess at surface, color, etc. Properties like density, viscosity, melting and boiling point are also covered in this section. At room temperature, this metal is a Silver Solid. It starts melting at 1,568.00 °C. All these Protactinium metal properties together define what is Protactinium?

Modern Periodic Table

Modern Periodic Table
Group →

Period ↓

1

2

3

4

5

6

7

1

H

2

3

La-Lu
Ac-Lr

4

5

6

7

8

9

10

11

12

13

B

14

C
Si
Ge

15

N
P
As
Sb

16

O
S
Se
Te

17

F
Cl
Br
I
At

18

He
Ne
Ar
Kr
Xe
Rn
Og