Question

1 what are the demetis of mendevels periodic table
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Answer 1

Answer:

Demerits of Mendeleev Periodic Table

He was unable to locate hydrogen in the periodic table.

Increase in atomic mass was not regular while moving from one element to another. ...

Later on, isotopes of elements were found which violated Mendeleev's periodic law.

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Answer 2

Answer:

Even though he successfully arranged the elements based on their atomic masses there were some limitations to Mendeleev's periodic table.

Explanation:

Mendeleev's periodic table was made based on atomic masses. Even though he successfully arranged the elements based on their atomic masses there were some limitations to Mendeleev's periodic table.

• He failed to put hydrogen in the periodic table.

• He failed to put elements in their increasing atomic mass hence missing elements could not predict based on atomic mass.

• Isotopes were not given space in the periodic table.