Nitrogen has an atomic number of 7.Which of the following electronic configurations is of a nitrogen atom in the ground state?
Correct answer: A. 1s2, 2s2, 2px1, 2py1, 2pz1
- A. 1s2, 2s2, 2px1, 2py1, 2pz1
- B. 1s2, 2s2, 2px2, 2pz1
- C. 1s2, 2s2, 2px2, 2py1
- D. 1s2, 2s2, 2py2, 2pz1
Explanation
The electronic configuration of nitrogen is as follows: 1s2, 2s2, 2p3. The 'Auf-bau principle' states that electrons fill lower-energy atomic orbitals before filling higher-energy ones. Moreover, we have the 'Hund's Rule' stating that when electrons occupy degenerate orbitals (i.e. of the same energy level), they must first occupy the empty orbitals before double occupying them.
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