Element on Earth are as many as ±110 elements. Every element has unique atomic structure which determines their chemical properties. Eighty percent of all element are metals.
In 1869 a Russian scientist Dmitri Mendeleyev devised a way to arrange elements so that their man properties can be seen at once. This method developed into periodical table used now. Periodical table arranges elements in rows according to atomic numbers and in columns according similarity in chemical properties.
Posts
