# How many valence electrons are in Fr^+?

May 15, 2017

$F {r}^{+}$ is the ionized form of the element. The definition of the valence level is 'the highest principle quantum number of the electronic configuration'.
$F {r}^{o} \left[R n\right] 7 {s}^{1}$ + 1st Ionization Energy => $F r {\left[R n\right]}^{+} + 1 {e}^{-}$
Since the $7 {s}^{1}$ electron is no longer present in $F r {\left[R n\right]}^{+}$ and n = 7 is the highest principle quantum number then there are no electrons in the valence level.