Question

three
between mendelun
any difference
ond Modern periodic table​

Answer 1

Answer:

Main Difference – Mendeleev vs Modern Periodic Table

The periodic table is the arrangement of chemical elements according to their chemical and physical properties. The modern periodic table was created after a series of different versions of the periodic table. The Russian Chemist/Professor Dmitri Mendeleev was the first to come up with a structure for the periodic table with columns and rows. This feature is the main building block for the modern periodic table as well. Mendeleev was able to identify that chemical properties of the elements began repeating each time after a certain number of elements. Hence, the term ‘periods’ came into use, resembling this character of repetition. The columns in the periodic table are called groups, and they group together elements with similar properties. The rows in the periodic table are called periods, and they represent sets of elements that get repeated due the possession of similar properties. The main difference between Mendeleev and Modern Periodic Table is that Mendeleev’s periodic table orders the elements based on their atomic mass whereas Modern periodic table orders the elements based on their atomic number.