Question

Which classification of elements failed after the discovery of noble gases?

Answer 1

mendeleev's table..because there was no space given to the noble gasses

Answer 2

Answer:

• “Mendeleev periodic table” is the classification of the elements which are failed after the ‘discovery of noble gases’.

• According to the Mendeleev periodic table –The “physical and chemical properties” are the ‘periodic functions’ of their respective atomic mass.

• In the ‘increasing order’ of their respective Atomic masses, Mendeleev arranged all the elements at that time so that chemically similar elements were placed in the same ‘vertical column’.

Drawbacks of periodic table:

• Position of Hydrogen is not well defined.
• Unlike elements are placed in same row. Example- Potassium and copper.
• Metals and non-metals are placed in the same group. Examples- Manganeese and Bromine.
• There is no separate column for Nobel gases.