Which one of these elements is not a noble gas, and therefore isn't odorless, colorless, and monatomic?

The noble gases are a group of chemical elements with comparable characteristics: they're all odorless, colorless with extremely minimal chemical reactivity. Helium, Neon, Argon, Krypton, Xenon, and Radon can be found in nature. Nitrogen, on the other hand, is not a noble gas.

Asked by Vasilii Kulev · Last updated 3 years ago · 716 views · SOURCE