I know that the periodic table contains many elements. That it even contains alkali metals, transitions, noble gases, nonmetals, and halogens.
has the same number of The element names that I know are boron, carbon, Hydrogen, Helium, Lithium, Neon, Potassium, Krypton, Barium, Oxygen, Calcium, Radium, and Magnesium. I know that Carbon one of the most important elements. Dmitri Mendeleev invented the periodic table. In the table, each group also has the same number of electrons in the outer orbital. And that elements are arranged by increased order of atomic numbers.