In which musical note did Newland put the metals Co and Ni with halogens?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Do.
In Newlands' Law of Octaves, elements were arranged in groups of eight, similar to musical notes. Cobalt (Co) and Nickel (Ni) were placed under 'Do' (the first note) along with halogens like fluorine (F) and chlorine (Cl).
This classification highlighted periodic trends but was later replaced by Mendeleev’s periodic table. Newlands' analogy compared chemical properties to musical octaves, though it had limitations.