Question

Differentiate between valency and oxidation state (at least three differences
What is basic difference in Mandeleey nerindic law and modern narindie In​

Answer 1

Answer:

Valency is the number of electrons present in the outermost shell of a particular element whereas oxidation state is the number of electrons that an element in a particular compound has lost or gain. Valency does not indicate the electric charge of an atom in a compound whereas oxidation number indicates the electric charge of an atom in a compound . Valency of a pure element depends on the number of electrons it has in its outermost shell whereas oxidation state of a pure element is always zero.

Mendeleeves periodic law

The physical and chemical properties of the elements are the periodic functions of the atomic weight

Modern periodic law

The physical and chemical properties are the periodic functions of the atomic number