What Is the Electron Configuration for Strontium?

The electron configuration of strontium, according to the Jefferson Lab website, is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2. This element has the noble gas configuration [Kr] 5s2, where [Kr] represents the electron configuration of krypton.

The atomic number of strontium is 38, which indicates that it contains 38 protons. An equal number of protons and electrons cancel each other out in a neutral atom, resulting in a net charge of zero. Therefore, one neutral strontium atom must contain 38 electrons.

Around the nucleus, these electrons are grouped in energy levels. This element’s electron configuration allows pupils to easily determine the arrangement of electrons in a strontium atom. There are two individuals in the first energy level, eight individuals in the second energy level, 18 individuals in the third energy level, eight individuals in the fourth energy level, and two individuals in the fifth energy level.


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