Question

How could the Modern Periodic Table remove various anomalies of Mendeleev's Periodic Table?
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Answer 1

* It have dealt with isotopes of the element. That the isotopes of the element are treated as the same element as almost their properties are similar.

* Hydrogen has been given a separate place in the modern periodic table.

* The elements not found at that time (Mendeleev's time) are now found and replaced the the gaps named Eka aluminum,Eka silicon ,etc,.

* The elements we're arranged on the increasing atomic number.

* Metals,Non-metals are separated in different groups.

* Metalloids are separated from metals and Non-metals with a dark zigzag line.

Answer 2

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Various anomalies of Mendeleev’s Periodic Table removed as follows in the Modern Periodic Table:

→ Elements are arranged in the increasing order of their atomic number in Modern Periodic Table, thus there was no need for keeping more than one element in one slot.

→ In Modern Periodic Table there was no problem of the place of isotopes, as isotopes have same atomic mass with different atomic numbers.

→ Elements having same valence electron are kept in same group.→ Elements having same number of shells were put under the same period.

→ Position of hydrogen became clarified in as it is kept in the group with the elements of same valence electrons.

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