The chemists changed the periodic table over time they have added new elements to the table.
- The periodic table is a tabular array of the chemical elements organized by atomic number, from the element with the lowest atomic number, hydrogen, to the element with the highest atomic number, oganesson. The atomic number of an element is the number of protons in the nucleus of an atom of that element.
- As new elements are discovered chemists add them to the period table leading to the periodic table undergoing continuous modifications. When the first periodic table in the world was formed, very few elements were known to humankind. Earlier periodic tables thus contain n lesser number of elements than the modern ones.
- Mendeleev's periodic table contained 63 elements arranged in the increasing order of their atomic masses. Modern periodic tables have far more numbers than the older ones like Mendeleev's and the elements are arranged in the order of their atomic numbers.
Learn more about the periodic table
https://brainly.com/question/21938331
#SPJ2
