Question

Two chemistry students are working with two different samples of the element carbon. They know that the different samples are different isotopes.



Which property of the isotopes must be different?

Answer 1

a
the atomic number
b
the electric charge
c
the number of electrons
d
the mass number

Answer 2

The property that must be different between the isotopes is the number of neutrons in the nucleus.

Answer 3

d
the mass number