The electron configuration of an element is 1s2 2s2 2p5 . It forms a compound having an kernel notation of [Ar] 4s2 . Identify the compound.
Question
The electron configuration of an element is 1s² 2s² 2p⁵. It forms a compound having a kernel notation of [Ar] 4s². Identify the compound.
Solution
The electron configuration 1s2 2s2 2p5 corresponds to the element Fluorine (F), which has 9 electrons.
The kernel notation [Ar] 4s2 corresponds to the element Calcium (Ca), which has 20 electrons.
When these two elements form a compound, Fluorine will gain one electron to complete its outer shell and become a negative ion (F-), and Calcium will lose two electrons to empty its outer shell and become a positive ion (Ca2+).
Therefore, the compound formed will be CaF2, which is Calcium Fluoride.
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