Selenium’s electron configuration is 1s22s22p63s23p64s23d104p4. This configuration is also written as [Ar] 4s23d104p4, according to About.com contributor Dr. Anne Marie Helmenstine.
The electron configuration of an atom depicts the arrangement of electrons within the atom’s energy levels. This configuration offers a great deal of vital information regarding an element.
By examining the electron configuration of selenium, one may determine the number of electrons in each subshell. Only four of the five sub-shells are utilised by naturally occurring elements: s, p, d, and f. Each subshell contains a specific number of electrons.
The s, p, d, and f subshells may hold a maximum of two, six, ten, and fourteen electrons, respectively. The first energy level of selenium has two electrons in subshell s. The second level of energy has eight electrons. Two of these electrons reside in subshell s, while the remaining six reside in subshell p.
The third energy level contains 18 electrons in total. Subshell s contains two, subshell p has six, and subshell d contains ten. The last energy level has a total of six electrons. Two electrons occupy subshell s, while four electrons occupy subshell p. The total number of electrons in all energy levels is 34.
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