Per NCERT §3.2, John Newlands' LAW OF OCTAVES (1865) noted what about elements arranged by increasing atomic weight?
AEvery fifth element had identical mass
BElements split into two halves perfectly
CAtomic weight = group number
DEvery eighth element had properties similar to the first, like notes in an octave of music
Answer & Solution
Correct answer: D. Every eighth element had properties similar to the first, like notes in an octave of music
Per NCERT §3.2, Newlands' Law of Octaves — every 8th element resembled the 1st (like music). Worked only up to Ca. Davy Medal 1887.
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