Period 2 elements

Period 2 introduces the elements with two electron shells, from lithium to neon. This row contains carbon, nitrogen and oxygen - the foundations of organic chemistry and life on Earth.

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Category: All elements Nonmetals Noble gases Alkali metals Alkaline earth metals Metalloids Post-transition metals Transition metals Lanthanides Actinides

Period: 1 2 3 4 5 6 7