Periodic classification is a system used to organize and categorize the elements based on their properties and atomic structure. It helps to understand the trends and patterns among the elements and their behavior.
The periodic table was created by Russian chemist Dmitri Mendeleev in 1869. He arranged the elements in order of increasing atomic weight and grouped them based on their similar properties.
The periodic table is important because it provides a framework for understanding the properties and behavior of elements. It also helps in predicting the properties of new elements and their compounds.
The elements are arranged in the periodic table in order of increasing atomic number. They are also organized into groups or families based on their similar properties, and these groups are arranged in periods or rows.
The main groups of elements in the periodic table are the alkali metals, alkaline earth metals, transition metals, halogens, and noble gases. Other groups include the lanthanides and actinides, also known as the rare earth elements.