The modern periodic table has been evolved through the ear$ attempts of Dobereiner, Newland and Mendeleev.

Question

The modern periodic table has been evolved through the ear$ attempts of Dobereiner, Newland and Mendeleev.

The modern periodic table has been evolved through the ear$ attempts of Dobereiner, Newland and Mendeleev. List one advantages and one limitation of all the three attempts.

Monjur Alahi

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2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

	Advantages	Limitation
Dobereiner	Properties of elements in each triad were similar.	Only three triads were identified. Triads for all known elements were not prepared.
Newland	The properties of the first element is similar to the eighth element	It was only applicable upto Calcium. Rest of the elements were not discovered.
Mendeleev	It was easy to study the physical and chemical properties of various elements	The position of hydrogen was not assigned. The position of isotopes was not certain.