posted by natash on .
what is the electron configuration for Au+ ?
where does f block fit in?
There is a 4f series and a 5f series. The 4f series (what I call the Lanthanide series) has the first 4f electron (actually two of them) enter at Ce (#58). The 5f series has the first 5f electron (actually two of them) entering at Pa(#91).