(Jimmy of the Clue Crew indicates the right-hand column of the periodic table.) On the periodic table, the six gases in this column, beginning with helium & ending with radon, are described as this, because they don't readily react with other elements
.... Gossima was 
the original name of what game: Table Tennis .... What is Virga-Rain the don't 
reach ground ... What fish has its head at right angles to its body- Sea Horse ...... 
Sun has 90% hydrogen, 8% helium and 2% other elements.