SSC MTS EXAM

Detailed explanation-1: -The periodic table was invented by Russian chemist Dmitri Mendeleev in 1869. However, prior to Mendeleev, chemists had been pondering for decades how to classify the elements. Beginning in 1789, Antoine Lavoisier began classifying elements by their properties.

Detailed explanation-2: -On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing … the periodic table.

Detailed explanation-3: -By 1869, a total of 63 elements had been discovered. As the number of known elements grew, scientists began to recognize patterns in properties and began to develop classification schemes.