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The atomic number of the isotopes of an element is identical; the mass number is different.
Isotopes of an element have different masses because their nuclei have different numbers of neutrons.
Because of the difference in mass number. Isotopes must have different numbers of neutrons.
Isotopes have different numbers of electrons, but not different atomic numbers (numbers of protons) or they'd be different elements.
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Isotopes differ in the number of neutrons they possess.
Isotopes of an element have nuclei with the same number of protons (the same atomic number) but different numbers of neutrons Neutrons (:
The isotopes of the same element has the same atomic number. But the mass number (atomic mass) is different.
The atomic number of the isotopes of an element is identical; the mass number is different.
Isotopes of an element have different masses because their nuclei have different numbers of neutrons.
Because of the difference in mass number. Isotopes must have different numbers of neutrons.
They have different numbers of neutrons, which changes the atomic mass and nuclear properties.
Isotopes have different numbers of electrons, but not different atomic numbers (numbers of protons) or they'd be different elements.
It can if isotopes are present. They can contain different numbers of neutrons in the nucleus.
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Elements can exist in the form of different isotopes. Isotopes of the same element have the same number of protons in their nuclei but have different numbers of neutrons. The first gives them the same atomic number and chemical properties while the second gives them different atomic weights.
No. By definition isotopes of an element have the same number of protons (that is what makes them uranium, for example) but different numbers of neutrons (neutral particules in the nucleus which provide mass).