Periodic Classification of Elements: NCERT Solutions Class 10 Chapter 2
NCERT Intext: Questions Answer
1. Did Dobereiner’s triads also exist in the columns of Newlands’ Octaves ? Compare and find out.
Answer: Yes, Dobereiner’s triads also existed in the columns of Newland’s Octaves. For example, Li, Na, K.
If we consider lithium (Li) as the first element, then sodium (Na) is eighth element. If we consider sodium as the first element, then potassium is the eighth element. From this we conclude that Dobereiner’s triads also exist in the columns of Newland’s octaves.
NCERT Exercises: Questions Answer
Acids, Bases and Salts Download NCERT pdf