Mention any defects or anomalies in Mendeleev's... – Mattrab

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Classification of Elements

Prabin Kalikote asked in Classification of Elements

Mention any defects or anomalies in Mendeleev's periodic table.

1 Answer 128 Views

Prabin Kalikote answered

Any 4 defects in Mendeleev's periodic table are:

Inert gas or noble gases were absent.
It couldn't arrange lanthanides and actinides.
Its eight groups weren't divided into sub-group.
It couldn't arrange isotopes.