Jakie to pierwiastki?

O, H, C, N, F, Li, Be, Al, Si, P, S, CI, B, K, Na, Mg, Ba, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Se, Br, Sr, Ag, Cd, In, Sn, I, W, Pt, W, Au, Hg, TI, Pb, Bi, Po, Ra, He, Ne, Ar, Kr, Xe, Rn​