What is periodic table?

What is the periodic table?

The periodic table is a tabular arrangement of chemical elements, organized on the basis of their atomic number, electron configurations, and recurring chemical properties. The structure of the table shows periodic trends. The seven rows of the table, called periods, generally have metals on the left and nonmetals on the right. The columns, called groups, contain elements with similar chemical behaviors. Six groups have accepted names as well as assigned numbers: for example, group 17 elements are the halogens; and group 18 are the noble gases. Also displayed are four simple rectangular areas or blocks associated with the filling of different atomic orbitals.

The periodic table has been refined and extended over time, as new elements have been discovered and the properties of known elements have been better understood. The current version of the periodic table contains 118 elements, including 92 naturally occurring elements and 26 synthetic elements.

The periodic table is a valuable tool for chemists, physicists, and other scientists. It can be used to predict the properties of elements, to identify elements in unknown substances, and to understand the chemical reactions that occur between elements.

Here are some of the benefits of using the periodic table:

• It can be used to predict the properties of elements.
• It can be used to identify elements in unknown substances.
• It can be used to understand the chemical reactions that occur between elements.
• It can be used to organize and classify information about elements.
• It can be used to teach students about chemistry.

The periodic table is a powerful tool that can be used to learn about the world around us.