Periodic table study

Periodic table is a graph with chemical elements. Its in order of atomic numbers. Periodic table is the most important tool of chemistry. The rows on the periodic table is called periods. The creator of periodic table is Dmitri Mendeleev. 118 elements have been discovered on planet earth, they have been grouped together from their attributes. There are 10 groups , their name's are Alkali Metal, Alkaline Earth, Transitions Metal, Basic Metal, Semimetals, Nonmetals, Halogens,  Noble gas, Lanthanides, Actinides.