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According to Newlands' law of octaves, the properties of an element are similar to which other element in the sequence?
AThe third element from it
BThe second element from it
CThe eighth element from it
DThe fifth element from it
Answer & Solution
Correct answer: C. The eighth element from it
1. In 1866 Newlands arranged elements in increasing order of atomic mass.
2. He observed that every eighth element repeated the properties of the first.
3. For example, sodium is the eighth element from lithium and resembles it.
4. He compared this to the eight notes (octave) in music.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 2 "Periodic Classification of Elements", p.26_
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