Newlands' law of octaves was based on:
ASound waves across all cases
BRepeating properties every eighth element
CAtomic number by common convention
DElectron count
Answer & Solution
Correct answer: A. Sound waves across all cases
1. Newlands observed that arranging elements by mass produced a pattern.
2. Every eighth element repeated similar properties.
3. He compared this with the musical octave.
4. Hence the name law of octaves.
_Source: Selina Concise Chemistry ICSE Class 9, Ch 5 'The Periodic Table'_
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