Question

What is merits and demerits of Mendeleev's periodic table?

Answer 1

Explanation:

Marits of Mendeleev's periodic table are---

• Mendeleev's periodic table in the bases on most fundamental properties of an element i.e. atomic mass.
• On the basis of positions of a element his periodic table he was corrected the atomic mass of some element. Example - Be(13.5)------- Be(9).
• He has left some gap in his periodic table for future element and it was formed found to be correct.

Demarits of Mendeleev's periodic table are---

• Atomic number is the fundamental properties of an atom not atomic mass as assumed by Mendeleev's.
• Problems of isotopes ---------- number of isotopes place given for isotopes of some elements.
• Causes of periodicity --- he could not explain two causes of periodicity.

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