The periodic table is a tabular display of the chemical elements. Its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869, who intended the table to illustrate recurring (“periodic”) trends in the properties of the elements. The layout of the table has been refined and extended over time, as new elements have been discovered and new theoretical models have been developed to explain chemical behaviour.
As of 2011, the table contains 118 chemical elements whose discoveries have been confirmed. The first 94 are found naturally on Earth, and the rest are synthetic elements that have been produced artificially in particle accelerators.
In printed tables, each element is usually listed with its element symbol and atomic number; many versions of the table also list the element’s atomic mass.
This could be really handy for a project about chemistry, physics or the different elements.
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I will use this on the interactive whiteboard in my lessons. Thanks!