Katrina Weeks

Chemistry

18 July, 06:37

Why do electrons enter the 4s orbital before entering the 3d orbital?

O A. because the 3d orbital is at a lower energy level

OB. because both the 4s and 3d orbitals are at the same energy level

O c. because the 4s orbital is at a lower energy level

OD. because the 4s orbital is at a higher energy level

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