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Not a question of why. It just is, isotopes have the same atomic number, (which means that they are all the same element) with different neutron numbers.
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What atoms with same atomic number but different atomic masses?

Isotopes are atoms with the same number of protons (same atomic number) but different numbers of neutrons, leading to different atomic masses. For example, carbon-12 and carbon-14 are isotopes of carbon with atomic number 6 but atomic masses of 12 and 14 respectively.


Do isotopes have the same A number?

The atomic number is the same for the isotopes of a chemical element.


Do isotopes have the same atomic number and the same atomic mass?

No: They have the same atomic number but not the same atomic mass.


Atoms that have the same atomic numbers but different atomic weights are called what?

If they have the same atomic number but different mass, then they have a different number of neutrons, and they are called ISOTOPES.


Do the atomic number of isotopes differ?

No. Isotopes have the same atomic number, protons and electrons. They have different neutrons.


Isotopes can have the same?

Atomic number


What are atoms with same atomic mass but different atomic numbers called?

Isotopes. The isotope has the same number of protons and electrons as the regular atom, but has more (or sometimes less) neutrons, and therefore its atomic mass is more (or less, depending on whether the neutrons have increased or decreased).


Why do isotopes have the same atomic number?

Not a question of why. It just is, isotopes have the same atomic number, (which means that they are all the same element) with different neutron numbers.


What do two different neutral isotopes of the same element have in common nuclear number atomic mass nuclear mass atomic number?

The atomic number is the same for all isotopes.


Atoms of the same atomic are called what?

isotopes Atoms of the same element are called Isotopes. they have the same number of atoms (i.e. same atomic number) but different number of neutrons


How do the atomic number of the different isotopes an element compare?

The atomic number is the same for the all isotopes of a chemical element.


Atoms of same chemical element that have different atomic mass are known as?

Isotopes. They differ in the number of neutrons in the nucleus.