Group 18 Elements

#	Symbol	Name	Atomic Mass	Category
2	He	Helium	4.003	Noble Gases
10	Ne	Neon	20.18	Noble Gases
18	Ar	Argon	39.95	Noble Gases
36	Kr	Krypton	83.798	Noble Gases
54	Xe	Xenon	131.293	Noble Gases
86	Rn	Radon	222	Noble Gases
118	Og	Oganesson	294	Noble Gases

7 elements