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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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Answer:

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

psamila18
C. Because as it get farther from the nucleus the amount of energy is decreasing

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