WBCS.LIVE practice question

According to Newlands law of octaves, beryllium resembles which of the following dements?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. Sodium
  2. Magnesium
  3. Calcium
  4. Aluminium

Correct answer and explanation

Correct answer: Magnesium

Explanation: According to Newlands’ Law of Octaves, Beryllium resembles Magnesium, as every 8th element has similar properties. 📚 Other Information: ▪️ John Newlands proposed the law in 1864. ▪️ He arranged known elements in increasing atomic mass. ▪️ Every 8th element showed repetition of properties (like musical octaves). ▪️ Worked well only for lighter elements (up to Calcium). ▪️ Failed for heavier elements. ▪️ Beryllium (Be) is in group 2, similar to Magnesium (Mg). ▪️ The law was replaced by Mendeleev’s periodic law. ▪️ Basis of modern periodic classification.