Question

how are the elements classified??

Answer 1

according to modern periodic table elements are classified on the basis of atomic number

But according to Mendeleev periodic table elements are classified on the basis of atomic weights

Answer 2

The next thing in our review is toclassify the elements into three groups. These three groups are: metals, nonmetals, and inert gases. Let's look at where these groups are located on the periodic table and correlate them with the ability to lose and gain electrons.