Question

Newlands law of octaves seemed to be true only for elements upto_____________. here, A refers to

• A. Calcium
• B. argon
• C. potassium
• D. zinc

Answer 1

The correct option is A

Calcium

The explanation for the correct option:

The Newlands law of octaves states that every eighth element has similar properties when the elements are arranged in the increasing order of their atomic masses.

(A) Newlands law of octaves seemed to be true only for elements up to calcium because after calcium eighth element does not possess the same properties as that of the first.

The explanation for the incorrect option:

Potassium is placed under calcium in the periodic table, and argon and zinc come after calcium in the periodic table.

So, option A is correct, Newlands law of octaves seemed to be true only for elements up to calcium.