Write two major shotcomings of mendleeev periodic table how have these beeen removed in the modern periodic table
Answers
Answered by
0
two major shortcomings of Mendeleev periodic table
i) position of isotopes : as atomic wt. of isotopes differ they should have placed in different position in Mendeleev periodic table. But there were no such places for isotopes in Mendeleev 's table
but as modern periodic table is based on atomic no. so this discrepancy have been removed.
ii) position of hydrogen: hydrogen resembles both the alkali metal( IA ) and the halogens (VIIA) IN properties so Mendeleev could not decide where to place it.
i) position of isotopes : as atomic wt. of isotopes differ they should have placed in different position in Mendeleev periodic table. But there were no such places for isotopes in Mendeleev 's table
but as modern periodic table is based on atomic no. so this discrepancy have been removed.
ii) position of hydrogen: hydrogen resembles both the alkali metal( IA ) and the halogens (VIIA) IN properties so Mendeleev could not decide where to place it.
Similar questions