Why was Mendeleev’s periodic table readily accepted by scientific community?

Mendeleev’s periodic table was readily accepted by scientific community due to the following advantages:

i. Mendeleev had left some gaps corresponding to certain atomic numbers in the periodic table so as to maintain periodicity of the properties. When the elements corresponding to these atomic numbers were discovered, they fitted well into the gaps with their properties as predicted by Mendeleev’s periodic law.

ii. Mendeleev did not predicted presence of inert gases, however, they were discovered in later years. It was possible to accommodate inert gases in Mendeleev’s periodic table by creating an additional group without disturbing the position of other elements in his periodic table.