Selenium is the thirty-fourth element in the periodic table. A periodic table contains 118 elements distributed in 7 rows and 18 columns. The rows are known as periods and the columns are the groups of the periodic table. The elements of the periodic table are arranged according to their atomic number.
Basic elemental properties of Selenium
There are 118 different elements in the periodic table but there are some basic elemental properties of each. In a periodic table, elements with basic elemental properties are grouped together. Basic elemental properties of Selenium are:
Atomic Symbol of Selenium
Every element in the periodic table has its atomic symbol or chemical symbol for representation. The atomic symbol of Selenium is “Se”
Atomic Number of Selenium
Elements in the periodic table are arranged in groups and periods on the basis of their atomic number.
Atomic number is the number of protons present in the nucleus of an atom. The atomic number of Selenium is 34. This shows Selenium is the thirty-fourth element of the periodic table.
Short Electronic Configuration of Selenium
Short Electronic Configuration of Selenium is [Ar]4s2 3d 10 4 p4
Block of Selenium in Periodic Table
There are four blocks (s, p, d, f) in the periodic table. Selenium belongs to the p-block of the periodic table. P block is the second block in the periodic table.
Group of Selenium in Periodic Table
Groups are the columns of the periodic table and Selenium belongs to the sixteen group.
Period of Selenium in Periodic Table
Periodic table is arranged in periods and groups. The rows going across left to right are periods and Selenium is placed in the fourth period. Elements that are present in a period share common properties .
Atomic Mass of Selenium
Atomic mass is the mass of an atom and the atomic mass of Selenium is 78.971 u. If we round off the atomic mass of Selenium, we get 78 u.
Thermodynamic properties of Selenium
Thermodynamic properties are the characteristic features of a system, capable of specifying the system's state. The thermodynamic properties of an element include chemical, physical and thermal properties. The thermodynamic properties of Selenium are:
Phase at STP
Phase at STP is the state in which an element is present. The stp phase of Selenium is “Solid”.
Melting Point of Selenium
Melting point is a temperature at which an element of substance changes its state from solid to liquid. The melting point of gray Selenium gas is 217 °C.
Boiling Point of Selenium
A boiling point is a temperature at which an element of a substance starts turning into vapors. The boiling point of gray Selenium gas is 684.9 °C.
Critical Temperature of Selenium
A critical temperature is a point at which a gas cannot become liquid even if we are applying pressure. The critical temperature of gray Selenium gas is 1766 K.
Critical Pressure of Selenium
The critical pressure required to liquefy a gas at its critical temperature. The critical pressure of gray Selenium gas is 27.2 MPa.
Molar Heat of Fusion of Selenium
Molar Heat of Fusion is the energy required to melt each mole of substance. The molar heat of fusion of gray Selenium is 6.69 kJ/mol.
Molar heat of Vaporization
The Molar heat of vaporization is the heat absorbed by the one specific mole of a substance. The molar heat of vaporization of gray Selenium gas is 95.48 kJ/mol.
Specific heat at STP
The specific heat of gary Selenium at STP is 321.2 J(kgK).
These are some of the main thermodynamic properties of Selenium. Let’s find out all the material properties of Selenium.
Material properties
We have discussed basic elemental properties and thermodynamic properties of Selenium gas. Besides these, there are many material properties of Selenium as well. Some of the material properties include density, molar volume, refractive index and thermal conductivity.
Density of Selenium
The density of gray Selenium element is 4.28 g/cm3
Liquid Density of Selenium element
The liquid density of Selenium atom is 3.99 g/cm3
Molar Volume of Selenium
The molar volume of Selenium is 16.39cm3/mol
Mohs hardness of Selenium Atom
The mohs hardness of Selenium element is 2
Bulk modulus of Selenium Gas
The bulk modulus of Selenium Gas is 8.3 GPa
Shear modulus of Selenium atom
The shear modulus of Selenium element 3.7 GPa
Young's modulus of Selenium
The young's modulus of Selenium atom 10 GPa
Sound speed of Selenium atom
The sound speed of Selenium gas is 3350 m/s
Thermal Conductivity of Selenium
The thermal conductivity of Selenium is 0.52 W/(mK)
These are the main material properties of Selenium.
Electromagnetic properties of Selenium
When there is any emission or absorption of electromagnetic radiations, a martial responds to these changes. All elements of a periodic table have electromagnetic properties. Some of the main electromagnetic properties of Selenium gas include magnetic types, magnetic volume, mass magnetic susceptibility and color.
Magnetic type of Selenium element
The magnetic type of Selenium atom is diamagnetic
Volume Magnetic Susceptibility of Selenium
The volume magnetic susceptibility of Selenium is -1.93 x 10 -5
Mass Magnetic Susceptibility of Selenium
The mass magnetic susceptibility of Selenium is -4 x 10-9 m3/kg
Molar Magnetic Susceptibility of Selenium
The molar magnetic susceptibility of Selenium gas is -3.16 x 10-10 m3/mol
Color of Selenium Gas
The color of Selenium gas is gray.
These are some of the main electromagnetic properties of Selenium gas.
Reactivity of Selenium
Valency of Selenium
The valency of a Selenium element is a number that represents the ability of an atom to combine with other atoms. The valency of Selenium is 6.
Electronegativity of Selenium
Electronegativity of Selenium is the tendency of its atom participating in a covalent bond to attract the bonding electrons. Selenium has 2.55 electronegativity.
Electron affinity of Selenium
Electron affinity of Selenium gas is the energy released when one electron is added to a neutral atom to form an anion. The electron affinity of Selenium is 195 kJ/mol
First ionization energy of Selenium
It is the energy to remove the outermost electron from the neutral atom in the gas phase. The first ionization energy of Selenium is 941 kJ/mol
Atomic properties
The atomic properties of Selenium have term symbol, atomic radius, covalent radius, van der waals radius.
Term Symbol of Selenium
The term symbol specifies the electronic state of an atom. The term symbol of Selenium atom is 3 P2
Atomic Radius of Selenium
The total distance from an atom's nucleus to the outermost orbital of an electron is its atomic radius. The atomic radius of Selenium is 115 pm.
Covalent Radius of Selenium
Covalent radius is the measurement of an atom's size that forms a covalent bond. The covalent radius of Selenium is 120 pm.
Van der Waals Radius of Selenium
Van der waals radius is the measurement for the size of an atom that is not chemically bonded. The van der Waals radius of Selenium is 190 pm.
Abundances of Selenium
It is the measure that tells us about the percentage of which it is present.
Abundance of Selenium in the universe
The abundance of Selenium in the universe is 3 x 10-6 mass %
Abundance of Selenium in earth's crust
The abundance of Selenium in earth's crust is 5 x 10-6 mass %
Abundance of Selenium in ocean
The abundance of Selenium in ocean is 4.5 x 10-8 mass %
Universe Molar Abundances of Selenium
The universe molar abundances of Selenium is 5 x 10-8 mol %
Ocean Molar Abundances of Selenium
The ocean molar abundances of Selenium is 3.5 x 10-9 mol %
Crust Molar Abundances of Selenium
The crust molar abundances of Selenium is 9.9 x 10-7 mol %
Human Molar Abundances of Selenium
The crust molar abundances of Selenium is 4 x 10-7 mol %
Nuclear properties of Selenium
Half life of Selenium
Half life is the time for the radioactivity of a specified isotope to fall to half its original value. The half Life of Selenium is stable.
Stable isotopes of Selenium
The stable isotopes of Selenium are 80 Se (49.61%)
Nuclear Spin of Selenium
The nuclear spin of Selenium is 74 Se: 0+
Unstable isotopes of Selenium
The unstable isotopes of Selenium is 79 Se (0.295yr)
Neutron Cross Section of Selenium
The neutron cross section of Selenium is 11.7 b
Identifiers of Selenium
CAS Number of Selenium
The CAS number of Selenium is 7782-49-2