The table shows the characteristics of four substances after they are placed in water.

substance
ion concentration
electrical conductivity
w
medium
good
x
low
poor
y
high
excellent
z
none
none

which compound is most likely the strongest electrolyte?
w
x
y
z

Electrolytes are chemicals that break into ions (ionize) when they are dissolved in water. The positively-charged ions are called cations, while the negatively charged ions are called anions.  

Strong electrolytes completely ionize in water. This means 100% of the dissolved chemical breaks into cations and anions.

Weak electrolytes partially ionize in water. Pretty much any dissociation into ions between 0% and 100% makes a chemical a weak electrolyte, but in practice, around 1% to 10% of a weak electrolyte breaks into ions.

If a substance doesn’t ionize in water at all, it’s a nonelectrolyte.

Explanation:

the first point, i am pretty sure.