What element best fits the symbol O ?

(a)  

What element best fits the symbol F ?

(a)  

What element best fits the symbol Ne ?

(a)  

What element best fits the symbol S ?

(a)  

What element best fits the symbol Cl ?

(a)  

What element best fits the symbol Ar ?

(a)  

What element best fits the symbol Se ?

(a)  

What element best fits the symbol Br ?

(a)  

What element best fits the symbol Kr ?

(a)  

What element best fits the symbol Te ?

(a)  

What element best fits the symbol I ?

(a)  

What element best fits the symbol Xe ?

(a)  

What element best fits the symbol Po ?

(a)  

What element best fits the symbol At ?

(a)  

What element best fits the symbol Rn ?

(a)  

What element best fits the symbol Lv ?

(a)  

What element best fits the symbol Ts ?

(a)  

What element best fits the symbol Og ?

(a)  

What element best fits the symbol Tm ?

(a)  

What element best fits the symbol Yb ?

(a)  

What element best fits the symbol Lu ?

(a)  

What element best fits the symbol Md ?

(a)  

What element best fits the symbol No ?

(a)  

What element best fits the symbol Lr ?

(a)