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Chemistry · Classification of Elements and Periodicity in Properties

हिन्दी

John Alexander Newlands proposed the Law of Octaves in 1865. According to this law, the properties of every eighth element are similar to those of the first element. This relationship was found to be true only up to which element?

  1. Potassium
  2. Calcium
  3. Sodium
  4. Chlorine

Correct answer · Option 2

Calcium

Explanation

Newlands' Law of Octaves worked well only for lighter elements up to calcium (atomic mass 40), after which every eighth element did not possess similar properties.
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