Question

1. the ______________ depends on the mass number and the percent abundance of every isotope. (1 point)

• atomic number
• mass number
• average atomic mass
• ion

Explanation:

The average atomic mass of an element is calculated by taking the mass - number of each isotope and multiplying it by its percent abundance, then summing these values. The atomic number is the number of protons and is fixed for an element. The mass - number is for a single isotope. An ion is an atom with a charge.

Answer:

C. average atomic mass