In Newland's table, cobalt and were placed in the same column along with fluorine, chlorine and bromine.
A
iron
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B
sodium
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C
nickel
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D
carbon
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Solution
The correct option is C nickel
In order to fit elements into law of octaves, Newlands, not only adjusted two elements in the same slot but also adjusted some unlike elements under the same note.
Cobalt and nickel are in the same slot and are positioned in the same column with fluorine, chlorine and bromine possessing different properties than these elements.
Iron possessing similar properties as cobalt and nickel, is placed far away from these elements.