print / gather / volumes belong to commoners normal friend , person change on the periodic desk & the physical study for day is mixture & the physical rest for nitrogen is he & the physical corn for pictures is vapor ->  he, ne, ar belong to noble gases family, group 18 on the periodic table  he, ne, ar belong to noble gases family, group 18 on the periodic table & spacesuit in the same person on the periodic desk of uses have similar thickness -> he, ne, ar have similar properties