How many orbitals are present in the d subshell?
Correct answer: B. Five
- A. Three
- B. Five
- C. Seven
- D. Nine
Explanation
For the d subshell l equals 2, so m runs from minus 2 to plus 2, giving five values and therefore five orbitals. With two electrons per orbital the d subshell holds a maximum of ten electrons, which is exactly the width of the d block in the periodic table. The p subshell has three orbitals and the f subshell has seven.
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About Quantum Numbers
Quantum numbers describe an electron's energy level, subshell, orbital orientation and spin. You examine the principal, azimuthal, magnetic and spin quantum numbers, their allowed values, orbital capacity and how they determine electronic configurations and distinguish electrons within an atom.
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