Question

give me short note on Mendeleev periodic table

Answer 1

Dmitri Mendeleev and Lothar Meyer individually came up with their own periodic law "when the elements are arranged in order of increasing atomic mass, certain sets of properties recur periodically
The concept of a systematic measure for atomic weights greatly contributed to the success of Mendeleev's periodic table. In 1864, with about 50 elements known, the British chemist John Newlands noticed a pattern when he arranged the elements in order of atomic mass, or weight...

Answer 2

1. mendilive periodic table have 118 elements.
2. elements are arranged in an increasing order of their atomic numbers.
3. vertical columns are called group. there are 18 groups
4. horizontal rows are called periods. There are 7 periods