Classification of Elements and Periodicity in Properties

Genesis of Periodic Classification^

Law of Triads: Johann Dobereiner (1829)

Law of Octaves: John Alexander Newlands (1865)

Periodic Law: Dimitri Mendeleev and Lothar Meyer.
It states that the properties of the elements are periodic
function of their atomic weights.

Modern Periodic Law: Henry Moseley (1913)
It states that the physical and chemical properties
of the elements are periodic functions of their atomic
numbers.

Electronic Configuration^

Electronic Configuration is the distribution of electrons into orbitals of an atom

Classification of Periodic table^

S-Block Elements

• Group 1 (alkali metals) and Group 2
(alkaline earth metals)

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P-Block Elements

d- Block Elements

f-Block Elements