MENDELEEV periodic table:
Here, hydrogen was not given a specific place.
This periodic table was based on mass number.
It has eight vertical columns called groups and 12 horizondal rows called periods.
seperation of metals and non metals cannot be distinguished from each other.
Iso topes are not given place
MORDEN PERODIC TABLE
Hydrogen was given a correct place
This periodic table was based on atomic number.
it contain 7 horizontal rows called periods and 18 vertical columns called groups
Separation of metals and non metals can be distinguished from each other.
Iso topes was given its places