Which element is most likely to have an oxidation number of +2? O sodium (Na)
O magnesium (Mg)
O chlorine (CI)
O argon (Ar)

Oh nskskakaaka

Answerthe half-reaction having the greatest tendency to occur at the anode:     i₂(aq) + 2e⁻  ⇄ 2i⁻  ;   e = +0.53 v======oxidation occurs at the anode. we must therefore find the half-reaction with the greatest tendency to oxidize.the given values of e are reduction potentials (the form of the half-reactions are of reduction).the lower the reduction potential, the higher the potential to oxidize. the half-cell with the lowest reduction potential will have the greatest tendency to oxidize at the anode.the half-reaction having the greatest tendency must be    i₂(aq) + 2e⁻  ⇄ 2i⁻    e = +0.53 vbecause its reduction potential is the lowest out of the three.

Idon't mean to be a smart alec, length of atoms' bonds is the simplest way to define it.

Ithink about 50 % of an original isotope's number of atoms remain