Question

The elements $A$ and $B$ obey Newland's law of octaves. How many elements are there between $A$ and $B$?

• A. 7
• B. 8
• C. 5
• D. 6

Answer 1

The correct option is D 6

According to the law of octaves, elements with similar physical and chemical properties occur after each interval of seven.

Thus, if $A$ is the first element and $B$ is the eighth element, thenumber of elements in between $A$ and $B$ is 6.

Hence, option D is correct.