Final answer:
The electronic configuration that does not correspond to a noble gas is 1s² 2s² because it lacks completely filled p orbitals and only represents beryllium, an alkaline earth metal.
Step-by-step explanation:
The question is asking to identify which electronic configuration does not correspond to a noble gas atom. The noble gases are known for having completely filled electron shells, which makes them very stable and not reactive. The following are the noble gas configurations:
- Helium: 1s²
- Neon: 1s² 2s² 2p⁶
- Argon: 1s² 2s² 2p⁶ 3s² 3p⁶
Given the options, 1s² 2s² does not represent a noble gas configuration, as it only represents the first two energy levels being filled, which corresponds to the element beryllium, a group 2 alkaline earth metal, and not a noble gas.