b What is the significance of atomic number in the modern classification of elements Explain with th...

Question

b What is the significance of atomic number in the modern classification of elements Explain with the help of an example

Accepted Answer

b The significance of atomic numbers in the periodic table is the arrangement of elements according to their electronic configuration The elements placed in the same group show similar chemical properties Example Atomic number of lithium is 3 and its electronic configuration is 21 It is placed in the first group as the valence electron is 1 and sodium has an electronic configuration of 281 having 1 valence electron and belongs to the same group

Lakhmir Singh Solutions Class 10 Chemistry Solutions for Exercise in Chapter 5 - Chapter 5 Periodic Classification of Elements