Question

11. Which of the following is not the limitation of Mendeleev's periodic table?
a. There was no place for isotopes in the periodic table.
b. A correct position could not be assigned to hydrogen in the periodic table.
C. Wrong order of atomic masses of some elements could not be explained.
d. He left gaps for yet to be discovered elements.​

Answer 1

Answer:

d.he left gaps for yet to be discovered elements

Explanation:

since this is an advantage of mendleev s periodic table

Answer 2

The statement given in the option (d) is not the limitation of Mendeleev's periodic table.

Explanation:

• To identify which statement is not the limitation of Mendeleev's periodic table, the merits and limitations of Mendeleev's periodic table must be identified.
• Accordingly, the merits and limitation of Mendeleev's periodic table are as follows:

Merits of Mendeleev's periodic table:

1. Mendeleev's periodic table had the structural arrangement of elements as groups and periods.
2. He left spaces or gaps for yet to be discovered elements and named them with succeeding elements prefixed with 'Eka'.
3. His periodic table also had positions for Nobel gas before their identification.
4. It corrected the incorrect atomic masses many elements.

Limitations of Mendeleev's periodic table:

1. The assignment of a fixed position to element hydrogen was not possible.
2. His periodic table didn't have any position for isotopes of elements.
3. The atomic mass of elements was not increasing in order.

• From the above-given merits and limitations of Mendeleev's periodic table, it is inferred that, statement given in option (a), (b), and (c) are limitations.
• Whereas the statement given in option (d) is not the limitation, as it is one of the merits of Mendeleev's periodic table.

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