chemistry

Trends in Chemical Properties of Periodic Elements

Ionisation Energy: It is the amount of energy required to remove an electron from the outermost orbit of an isolated gaseous atom. (If given in terms of the amount of work done in removing an electron, the property is called ionization potential.) Units: kJ / mol (for ionization potential, units: eV/atom.) This is denoted by word I. Read more about Trends in Chemical Properties of Periodic Elements[…]

1+ oxidation state

Periodic Trends in Properties of Elements

1. Periodicity in valency or oxidation states: Thevalence (or valency) of an element is a measure of its combining power with other atoms when it forms chemical compounds or molecules. The valence of elements is usually (though not necessarily) equal to the number of electrons in the outermost orbitals and/ or equal to eight minus the number Read more about Periodic Trends in Properties of Elements[…]

covalent-radius

Trends in Physical Properties of Periodic Elements

 1. Atomic Radius: It is defined as the distance from the centre of the nucleus to the outermost shell of electrons. For practical purposes, atomic radius can be defined in many ways. a) Covalent Radius: Half of the inter-nuclear distance between two identical or almost identical atoms bonded by a single covalent bond. For a diatomic molecule, Read more about Trends in Physical Properties of Periodic Elements[…]