The noble gases are the group of elements which are like no other elements. The noble gases are the elements grouped as the last group, group 18. These elements, from smallest to greatest atomic mass, are Helium, Neon, Argon, Krypton, Xenon, and Radon. Group 18 wasn't always called the noble gases. this group used to be called the inert gassses. They changed the name of thisi group because they are not always inert, or chemically inactive. the first element in this group is the element Helium. Helium has an atomic number of 2, and the chemical symbol for helium is He. helium is in the first period. The second element in this group is neon, which has an atomic number of 10. the chemical symbol is Ne, and is in period 2. The next element
