Final answer:
The noble-gas notation of the alkaline-earth metal with the largest atomic number is [Xe]6s².
Step-by-step explanation:
The noble-gas notation of the alkaline-earth metal with the largest atomic number can be determined by referencing the periodic table. The alkaline-earth metals are located in Group 2, while the noble gases are located in Group 18 of the periodic table. The alkaline-earth metal with the largest atomic number is Barium (Ba), with an atomic number of 56.
The noble-gas notation for Barium would be written as [Xe]6s², where [Xe] represents the electron configuration of the noble gas xenon (Xe) with an atomic number of 54