Question

how did Mendeleev arrange the elements he left empty places in his periodic table why explain the limitations of Mendeleev classification
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Answer 1

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Answer 2

Limitations of Mendeleev’s periodic table:

• The position of hydrogen in periodic table is not defined properly.
• The periodic table is uncertain.
• The position of isotopes that the isotopes are the atoms of the same element having different atomic masses.

• With accordance to the classification of Mendeleev, it should be placed at various places depending upon the atomic masses.

• Anomalous pairs of elements have increasing order of atomic masses are not obeyed.
• Mendeleev had placed elements with repective to the similarities in the properties and not in the atomic maases increasing order.

Arrangement of Mendeleev clasification:

• The periodic table is arrangement in a tabular form of the chemical elements according to atomic number.
• He had left some "empty spaces in the table" for where there are no "known elements" can fit the atomic mass and properties for that space.

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