It is [Ne] 3S2.
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The electron configuration for nitrogen is written as 1s2 2s2 2p3.
The electron configuration of zirconium is: [Kr]5s24d2
[Kr] 5s2
The electron configuration for Hf using noble gas shorthand is [Xe] 6s2 4f14 5d2. The noble gas shorthand represents the electron configuration of the noble gas xenon, which has an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6.
It is [Ar] 3d1 4s2