Question

The most significant contribution towards the development of periodic table was made by:
A.Mendeleev
B.Avogadro
C.Dalton
D.Cavendish

Answer 1

The periodic table of mendeleev was one of the significant contributions towards arrangement of elements according to the increasing order of their atomic weights. There were certain issues which arose but the main idea was put forward by him only.

Complete step-by-step answer: The most significant contribution towards the periodic table was given by Mendeleev whose full name was Dimitri Mendeleev. He has a very far view about the elements . Then the elements were there and they were arranged according to some of the common properties. Then he had a thought of having the periodic table in which according to his knowledge he arranged the elements according to the atomic masses. He also further reviewed the elements then arranged at that time.
Now we will discuss the arrangement he made in the periodic table.
He discovered that if elements are arranged according to their atomic weight then they further exhibit the similarity in the properties.
Also it was found that the elements got arranged in the increasing order and they also had similar properties . further when we talk about the same we come to know that the elements which are said to be most widely diffused have small atomic weights.
At that time still the discovery of many elements was to do this forms one of the drawbacks of his discovery. Now also it makes an easy task to study the properties of several similar elements. This same thing turns out to be contrasting with what he discovered.as periodic was discovered in order to make the study easy but due great difference in the atomic mass the period of the element got changed and due to this the difference in the properties arised.

Note: There were several drawbacks to this experiment but for sure it laid the basis for the elements to be arranged according to some criteria so that their properties study became easy. Also, the elements were there and they were arranged according to some of the common properties.