Francium has how many Valence Electrons?

As a member of the alkali metal group on the periodic table, francium possesses one valence electron. That valence electron is in the seventh energy level’s s-orbital.

1s2 2s2p6 3s2p6d10 4s2p6d10f14 5s2p6d10 6s2p6 7s1 is the entire electron configuration for francium, which may be simplified to [Rn] 7s1. The configuration implies that francium has one, two, eight, 18, 32, and 18 electrons in each energy level, in ascending order. As indicated by the element’s atomic number, one atom of francium has 87 electrons balanced by 87 protons. The sign Fr is used to represent Francium.

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Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.


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