7s1 because the definition of valence electrons are the outermost s and p electrons therefore in this case there is only an outermost s electron and therefore the answer is 7s1. NOTE:IT DOES NOT INCLUDE THE D AND THE F ELECTRONS!!!!
Other valence configuration examples include;
Nitrogen : 2s2 2p3
Chlorine : 3s2 2p5
Zinc: 4s2
Bromine: 4s2 4p5
Francium would likely form an ionic bond with bromine by transferring its single valence electron to bromine in order to achieve a stable electron configuration. This would result in the formation of francium bromide (FrBr).
Francium is a cation because it loses an electron to become positively charged.
Oh, dude, francium is like that rebellious teenager of the periodic table, so it's all like, "I'm gonna lose an electron and become a +1 ion." So yeah, the ion form for francium is Fr+1. But like, good luck finding francium in real life, it's super rare and unstable.
The shorthand electron configuration of magnesium is [Ne]3s².
The longhand electron configuration for Sulfur is 1s2 2s2 2p6 3s2 3p4.