P block elements

The elements in which the last electron enters the p-orbital of their outermost energy level are called p block elements. The elements of groups 13 to 18 involving addition of one (ns2 np1), two (ns2 np2), three (ns2 np3), four (ns2 np4), five (ns2 np5), and six (ns2...

S block elements

All the existing elements in the modern periodic table is divided into four main segments or blocks. A block consists of groups of elements having similar electronic configurations and properties. These are called s block, p block, d block and f-block. S block...

Groups in periodic table

The modern periodic table was constructed by the Russian chemist Dmitri Mendeleyev in 1869. The modern periodic table consists of horizontal rows called periodsand vertical columns called groups. These are discussed below: Groups in Modern Periodic Table A group may...

Periods in periodic table

The modern periodic table was constructed by the Russian chemist Dmitri Mendeleyev in 1869. The modern periodic table consists of horizontal rows called periods and vertical columns called groups. These are discussed below: Periods in the modern periodic table A...

Periodicity of elements

In chemistry periodicity of elements means the recurrence of similar properties of the elements after certain regular intervals when they are arranged in the order of increasing atomic numbers. Cause of Periodicity of Elements The cause of periodicity of the...