Question

who introduced the periodic law of elements for the first time state the law​

Answer 1

Dmitri Mendeleev

Dmitri MendeleevThe periodic law was developed independently by Dmitri Mendeleev and Lothar Meyer in 1869. Mendeleev created the first periodic table and was shortly followed by Meyer. They both arranged the elements by their mass and proposed that certain properties periodically reoccur .

Answer 2

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A Periodic Table may be defined as an arrangement or chart which classified as all the known element on the basis of their properties in such a way that the elements with similar properties are placed in the same vertical column and the similar elements are separated from one another .

• The physical and chemical properties of elements are a periodic function of thier atomic mass.

• Periodic table consists of seven horizontal column called period and eight vertical column called group.

• The element which lie on left side of each group consists of group is this are called Normal or Representative elements .

• The element which lie on right hand side of each group consist sub-group B . They are called transition elements.

• Groups are arranged on increasing atomic masses and grouping of similar element together .

The periodic law of elements is first given by Johannan Wolfgang Döbereiner's .

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