Question

Difference between mass number of an element and average molar mass is due to difference

in --------- of its different isotopes

a. Electrons b. Protons c. Neutrons d. Positrons​

Answer 1

Answer:

Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes. The mass number is a count of the total number of protons and neutrons in an atom's nucleus.