Question

state the features of modern periodic table.

Answer 1

The modern periodic table of the elements contains 18 groups, or vertical columns. Elements in a group have similar chemical and physical properties because they have the same number of outer electrons. Elements in a group are like members of a family--each is different, but all are related by common characteristics

Answer 2

in modern periodic table elements are classified on the basis of their atomic no..

according to it :- the properties of elements are periodic functions of their atomic no..

features.....
1. it had solved all the disparities of Mendeleev's periodic table..
2.in modern periodic table hydrogen is given a unique position due to its resemblance with alkali metal and halogens.