✓ Board-verified↻ asked 3×
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 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.
More from Periodic Classification of Elements
- In the following table, some elements have been arranged in a certain pattern: Identify the periodic law with…2022 · asked 3×
- State Newland Law of Octaves. 1+1+(1)/(2)+1 (1)/(2)=3 With an example, explain Dobereiner's Triads. List one…2022 · asked 2×
- In the modern periodic table, compare the tendency of the elements to lose electrons while moving (i) down a…2022
- An element 'M' has 25\% of the electrons filled in the third shell as in the second shell. The element ' M '…2025
- State the criteria used by Mendeleev for creating his Periodic Table. Compare the position of isotopes of…2022
- Give the criteria on the basis of which elements are placed (i) in a group and (ii) in a period in the modern…2022
- State Modern Periodic Law. How many rows and columns are there in the Modern Periodic Table?2022
- State Newland Law of Octaves. 1+1+(1)/(2)+(1)/(2)=3 With an example, explain Dobereiner's Triads. List one…2022
CBSE Class 10 Science past-paper question from the 2022board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.