write the electron configuration of the IONS in Mg, K, P, S, I
Mg ion = Mg+2 then
Shorthand notation of Mg = [Ne] 3s2
if Mg loses 2 electrons then [Ne] will be the ionic electronic concfiguration
K ion = K+ then
[Ar] 4s1
when losing 1 electron then
[Ar]
P has the next configuration
[Ne] 3s2 3p3
when gaining 3 electrons
then
[Ne] 3s2 3p6
For S
[Ne] 3s2 3p4
when gaining two electrons, i.e. S-2
then
[Ne] 3s2 3p6
For I, iodine then
[Kr] 4d10 5s2 5p5
it needs only one electron to transform into an anion , so
[Kr] 4d10 5s2 5p6
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