Answer:Hydrogen (sometimes)
Carbon
Nitrogen
Oxygen
Phosphorus
Sulfur
Selenium
Fluorine
Chlorine
Bromine
Iodine
Astatine
Tennessine (sometimes considered a halogen or metalloid)
Helium
Neon
Argon
Krypton
Xenon
Radon
Oganesson (possibly behaves as a "noble gas", except it won't be a gas under ordinary conditions)
Explanation:
