Question

What is the significance of atomic number in the modern classification of element explain with the help of example?

Answer 1

Henry Moseley showed that the atomic number of the element is more fundamental than its atomic masses.So the modern periodic law states that the properties of an element are the periodic function of their atomic numbers

Answer 2

Answer:

The significance of atomic numbers in the modern periodic table is that it helps in arranging the elements according to their electronic configuration. Since, the number of valence electrons is the same, elements placed in the same group show similar chemical properties.