What kind of energy does a thermometer measure?

A the average electrical energy of particles in a substance
B the average chemical energy of particles in a substance
C the average kinetic energy of particles in a substance
D the average potential energy of particles in a substance

Zinc contains about 30 protons 

What are the activitys?   sorry if this took your points : (

Caso4(s) < > ca+2 + so4^-2 ksp = [ca+2][so4^-2] = 2.4 x 10^-5 = [0.20][so4^-2] [so4^-2] =1.2 x 10^-4 ag2so4(s) ,> 2ag+ + so4^-2 ksp = [ag+]^2[so4^-2] = 1.5 x 10^-5 = (0.30)^2[so4^-2] [so4^-2] = 1.5 x 10^-5/0.09 = 1.7 x 10^-4 caso4 would precipitate first since it requires less so4^- to form a saturated solution.  i believe this is right, i hope it !  

Hey : )a transition from the first energy level to the fourth energy level