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Science · 2022 · 3 marks
CBSE 2022 · Region 4 · Set 1 · Q8
Name the elements whose compounds formed the basis of classification in Mendeleev's periodic table. Why did Mendeleev choose these elements? How the…
Name the elements whose compounds formed the basis of classification in Mendeleev's periodic table. Why did Mendeleev choose these elements ? How the formulae of these compounds had helped Mendeleev in deciding the position of an element in his periodic table ?
Marking-scheme solution
Hydrogen and Oxygen
He selected hydrogen and oxygen as they are very reactive and formed compound with most of the elements.
The formulae of hydrides and oxides formed by an element were treated as one of the basic properties of an element for its classification.
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