Question 1:
How could the Modern Periodic Table remove various anomalies of Mendeleev’s Periodic
Table?
Answer:
Mendeleev was unable to give fixed position to hydrogen and isotopes in the periodic
table. In Mendeleev’s periodic table, the increasing manner of atomic mass of the
elements is not always regular from one to its next. It was believed that a more
fundamental property than atomic mass could explain periodic properties in a better
manner.It was Henry Moseley who demonstrated that atomic number of an element
could explain periodic properties in a better way than atomic mass of an element and
arranged the elements in increasing order of their atomic numbers. Then it was found
that the various anomalies of Mendeleev’s periodic table were removed by the modern
periodic table.
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