What is the main difference among the isotopes of the same element?

What is the basic difference between the isotopes of an elements?

What is the difference between two isotopes of an element ?

What is the difference between two isotopes of an element ? Give one example.

Which diagram represents,isotopes of the same element?

Why do chemists consider different isotopes to be the same element even through their nuclei are not the same?

Would you expect the first lonization enthalpies of two isotopes of the same element to be the same or different? Justify your answer.

What is the reason for the different atomic masses of the isotopes of an element ?

What is the reason for the different atomic masses of the isotopes of an element ?

The isotopes of an element differ in