Final answer:
The most stable group in the periodic table is the noble gases, which have a full outer electron shell and do not easily form compounds. They are used in various applications such as lighting, welding, and medical procedures.
Step-by-step explanation:
The most stable group in the periodic table is the noble gases. This group consists of helium, neon, argon, krypton, xenon, and radon. The noble gases have a full outer electron shell, which makes them very stable and unreactive.
They do not easily form compounds with other elements and have low boiling points. Due to their stability, noble gases are often used in lighting, such as neon lights and fluorescent bulbs, as well as in various industrial processes and scientific applications.
For example, helium is used in balloons and airships because it is non-toxic, light, and does not react with other substances. Xenon is used in flash lamps and in the production of anesthesia, while argon is commonly used as a shielding gas in welding.
Learn more about stability of noble gases