The mole is most similar to:
a pound (a measure of weight)
a liter (a measure of volume)
a dozen (a measure of number)
a gram (a measure of mass)

Answer : The correct option is, a dozen (a measure of number).

Explanation :

Mole : It is defined as the amount of substance that contains Avogadro number of the substance.

Avogadro's number is given by .  That means,

Dozen : It is defined as the amount of substance that contains 12 number of particles.

Hence, the mole is most similar to a dozen (a measure of number).

the atomic mass is the bottom number on the element.

-steel jelly