Question

Which of the following pair of elements are expected to have similar properties according to Newland's law of octaves?

• A. $Ne,Ar$
• B. $C,N$
• C. $Na,K$
• D. $P,S$

Answer 1

Answer: (C)

$Na,K$

Newland's law of octaves states that if the chemical elements are arranged according to increasing atomic weight, those with similar physical and chemical properties occur after each interval of seven elements.
Na and K will have similar properties according to it.