differentiate between modern periodic table and Mendeleev periodic table
Mendeleev Periodic Table
The basis of Mendeleev’s periodic table was categorizing the elements according to their physical and chemical characteristics with regard to their atomic weights.
Mendeleev, however, was the first scientist to come up with a periodic trend to predict the properties of elements that were not discovered at that time. Therefore, Mendeleev’s periodic table had empty spaces/gaps, so that these elements, once found can be then included. Gallium and Geranium were two such elements.
Modern Periodic Table
The basis of the modern periodic table is the atomic number of elements; the physical and chemical properties of the elements are treated as periodic functions of their atomic numbers. Therefore, it gives meaning to the electronic configuration of each element. The modern periodic table consists of 18 columns called groups and 7 rows called periods. The Lanthanides and the Actinides are arranged into different blocks.
The main difference between Mendeleev and Modern Periodic Table is that Mendeleev’s periodic table orders the elements based on their atomic mass whereas the Modern periodic table orders the elements based on their atomic number.
Mendeleev Periodic Table
The basis of Mendeleev’s periodic table was categorizing the elements according to their physical and chemical characteristics with regard to their atomic weights.
Mendeleev, however, was the first scientist to come up with a periodic trend to predict the properties of elements that were not discovered at that time. Therefore, Mendeleev’s periodic table had empty spaces/gaps, so that these elements, once found can be then included. Gallium and Geranium were two such elements.
Modern Periodic Table
The basis of the modern periodic table is the atomic number of elements; the physical and chemical properties of the elements are treated as periodic functions of their atomic numbers. Therefore, it gives meaning to the electronic configuration of each element. The modern periodic table consists of 18 columns called groups and 7 rows called periods. The Lanthanides and the Actinides are arranged into different blocks.
The main difference between Mendeleev and Modern Periodic Table is that Mendeleev’s periodic table orders the elements based on their atomic mass whereas the Modern periodic table orders the elements based on their atomic number.
