It's predicted that this element will be shown to have seven. Please see the link.
Technetium has five electron shells.
Radium has seven electron shells.
The electron configuration of nickel is: [Ar]4s13d9 (four electron shells).
Six electron shells
There can only be 1 outer energy level.
Berkelium has seven electron shells.
Copernicium has 7 electron shells.
Technetium has five electron shells.
Actinium has seven electron shells.
Copernicium has 7 electron shells.
Promethium has six electron shells.
Plutonium has 7 electron shells.
Livermorium has 7 electron shells.
Berkelium has seven electron shells.
Tin has five electron shells.
Caesium has six electron shells.
see what period it is in on the periodic table it is in period 6, so therefore there are 6 electron shells or energy levels