H,He,B,C,N,O,F ,Ne,Si,P,S,Cl,Ar,As,Se,Br,Kr,Te,I,Xe,At,Rn
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H,He,B,C,N,O,F ,Ne,Si,P,S,Cl,Ar,As,Se,Br,Kr,Te,I,Xe,At,Rn