Question

Define classical perodic law

Answer 1

Law:.

The principle that the physical and chemical properties of elements are a periodic function of their proton number.

The concept was first proposed in 1869 by Dimitri Mendeleev

Answer 2

Explanation:

⏩ The principle that the physical and chemical properties of elements are a periodic function of their proton number. The concept was first proposed in 1869 by Dimitri Mendeleev, using relative atomic mass rather than proton number, as a culmination of efforts to rationalize chemical properties by J. W. ⏪

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