Identify the correct statement about Newlands’ law of octaves.

Question

Question

This question was previously asked in

SSC CGL 2023 Tier-I Official Paper (Held On: 21 Jul 2023 Shift 2)

He started with the element having the highest atomic mass (hydrogen) and ended at thorium which was the 56^th element.
He started with the element having the lowest atomic mass (hydrogen) and ended at sodium.
He started with the element having the lowest atomic mass (hydrogen) and ended at aluminium.
He started with the element having the lowest atomic mass (hydrogen) and ended at thorium which was the 56^th element.

Answer 1

The correct answer is He started with the element having the lowest atomic mass (hydrogen) and ended with thorium which was the 56th element.

Key Points

Newlands' law of octaves is a periodic table arrangement where every eighth element has similar properties.
Newlands started with the element having the lowest atomic mass (hydrogen) and ended with thorium which was the 56th element.
Option 1 is incorrect as Newlands did not start with the highest atomic mass element.
Option 2 is incorrect as Newlands did not end at sodium.
Option 3 is incorrect as Newlands did not end at aluminum.

Additional Information

John Newlands was an English chemist who proposed the law of octaves in 1865.
The law of octaves was later improved upon by Dmitri Mendeleev who created the modern periodic table.
The law of octaves was named so because every eighth element had similar properties, just like every eighth note in music is an octave.
Newlands' law of octaves was criticized by some scientists as it did not work for all elements.