Question

position of isotopes in the mendeleev's and the modern periodic table.give short note.

Answer 1

modern periodic table was constructed based on atomic number ( in the increasing order )

Answer 2

Hey there,

● Isotopes -
- Isotopes are elements with same atomic number but variable atomic masses.

● Position of isotopes in Mendeleev's periodic table -
- As Mendeleev's periodic table is arranged by atomic masses of elements, various isotopes of same element would take different positions.
- Simply, It doesn't consider the existence of isotopes.

● Position of isotopes in Modern periodic table -
- As modern periodic table arranges elements by atomic numbers, all isotopes of an element acquire same position.
- This is lot suitable because isotopes have similar properties.


Hope this helps...