Helping those who are in need of help with various Chemistry related topics...
The Periodic Table is the arrangements of elements into rows (periods) and columns (groups) according to their similar properties. In the 1860s, Dimitri Mendeleev suggested that the elements repeat at regular intervals when they are arranged in order of increasing atomic mass. Mendeleev is regarded as the architect of the modern periodic table. He has the insight and courage to predict the existence and properties of three elements before their discovery.
The periodic table is divided into many different sections: alkali metals, alkaline earth metals, transition metals, main group elements, halogens, noble gases, lanthanides, and actinides.
You can use the interactive periodic table below to find out more about each element.