Question

write demerites of the mendeleev's periodic table in terms of H2 and atomic masses.​

Answer 1

Answer:

demerites of the mendeleev's periodic table :

no fixed position was given to hydrogen in the Mendeleev periodic table.

positions of isotopes of all elements was not certain according to Mendeleev periodic table.

atomic masses did not increase in a regular manner in going from one element to the next.

Answer 2

• He was unable to locate hydrogen in the periodic table.
• Increase in atomic mass was not regular while moving from one element to another. Hence, the number of elements yet to be discovered was not predictable.
• Later on, isotopes of elements were found which violated Mendeleev’s periodic law.