Question

The telluric helix was given by
(A) De Chancourtois
(B) Newlands
(C) L Meyer
(D) Mendeleev

Answer 1

We must remember that the Telluric helix is a graphical representation in which the periodic chemical elements are arranged based on their atomic weights as a spiral wound round a cylinder.

Complete step by step answer:
We have known that In 1862, De Chan Courtois was the first person who proposed the classification of elements in a spiral graph form called a telluric helix. De Chan Courtois has formed spirally arranged atoms so called telluric helix on the basis of their increasing atomic weight. Therefore, the option A is correct.
We must remember that the John Newlands was a British chemist who arranged the chemical elements based on their atomic masses and in 1864, he published a Law of Octaves in which groups are arranged across the table while periods are arranged going down the table i.e., opposite to that of the modern periodic table. Therefore, the option B is incorrect.
We know that Meyer has formulated the former version of periodic table with just 28 elements, but he has not discovered any more elements present in $1864$. Therefore, the option C is incorrect.
Later is $1869$, Dmitri Mendeleev discovered the tabular form of chemical elements arranged according to their atomic weight which is known as the periodic table. He has also put forward the periodic laws to be followed for the periodic table. He also discovered new elements which were not known until then.
Therefore, the option D is incorrect.

So, the correct answer is Option A.

Note: Now we can discuss about the modern periodic table as,
We must know that in modern periodic tables, the vertical columns (groups) are filled with elements having similar properties whereas horizontal rows are filled with elements with the same valence shell configuration.
Only with the help of a periodic table, the theory of nuclear fission of heavy elements like uranium, plutonium and tritium was discovered.