Answer :

C,O NA,Cl,Al,B,Si,P,I,Li,H,He,Mg,N,F,S,Ca,Cr,Mn,Fe,Ni,Ba,Be,Pb,Cs,Fr,K,Br,Kr,Cu,Zn,Ag,Os,Ce,Cd 
Iknow this much only if u dont understand the sign just let me know I'll tell 

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