Question

what is mentelly periodical explain with example...​

Answer 1

Answer:

Mendeleev's periodic table based on the chemical properties of elements. It contains vertical columns called groups and horizontal rows called periods. For classifying he focussed on the oxides and hydrides formed by these elements. He arranged them according to their atomic mass.

With Moseley's contribution the Periodic Law can be restated: Similar properties recur periodically when elements are arranged according to increasing atomic number." ... The vertical columns have similar properties within their group for example Lithium is similar to sodium, beryllium is similar to magnesium, and so on.