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Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?

1. 3s, 4s, 3p, 3d
2. 4s, 3s, 3p, 3d
3. 3s, 3p, 3d, 4s
4. 3s, 3p, 4s, 3d

Correct answer: 3s, 3p, 3d, 4s

Solution

The correct order of increasing energy is: 3s, 3p, 3d, 4s.

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