Answer: because when its in an orbital notation its more than 10 electrons
Explanation:
Orbital notation is rarely used for atoms with more than 10 electrons because it will take a lot of space to fully draw the orbital notation.
The orbital notation is a representation of the electrons in an atom using boxes, blanks and arrows to show the energy sub-levels of each electron.
As the number of electrons increase beyond 10, the number of available energy sub-levels increases causing more boxes to be drawn in the orbital notation.
This will consume a lot of space. Hence, orbital notation is rarely used for atoms with more than 10 electrons because it will take a lot of space to fully draw the orbital notation.
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