Which would most likely form a homogenous mixture? O 10 marbles mixed with 10 small balls
O a pinch of sugar mixed with a cup of water
a pile of big rocks mixed with a bag of sand
O 1 cup of peas mixed with 1 cup of carrots

Yes you are correct use the scientific method

12 is probably the typical age for a first kiss but i think its to young.

It would be true sodium reacts with water in a violent way 

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.