The atomic number is the same for the isotopes of a chemical element.
Isotopes are atoms of the same element, having the same number of protons but different number of neutrons.
Isotopes of the same element have the same number of protons (atomic number) but differ in number of neutrons (hence atomic masses).
If an atom of the same element has the same number of protons but a different number of neutrons, then they are isotopes.
All the isotopes of an atom have the same number of protons but different number of neutrons.
The isotopes of the same element have an identical number of protons and electrons; the number of neutrons is different.
Isotopes are different forms of the same element which have different numbers of neutrons in their atomic nuclei. A given element is identified by the number of protons in its nucleus; that's its atomic number. Two different isotopes of the same element have the same number of protons, but each has a different number of neutrons in its nucleus. Different isotopes of the same element are chemically the same.
Isotopes of an element have the same numbers of protons in the nucleus (and corresponding electrons). It's not so much "can have", as "do have". It's just a different number of neutrons that makes a different isotope.
Isotopes. They differ in the number of neutrons in the nucleus.
Isotopes are atoms of the same elements with different number of neutrons.
The isotopes of an element have the same number of protons, but different numbers of neutrons.
Isotopes of the same element have a different number of neutrons.
Different elements with same number of neutrons are known as isotones.