They are called isotopes.
Isotopes are atoms of the same element, having the same number of protons but different number of neutrons.
Two different isotopes of an element have different numbers of neutrons. That's what an isotope is. So, no, isotopes of an element can not have the same number of neutrons.
Almost all the elements have different isotopes having same atomic no but different mass no or neutrons.
neutrons
An isotope of an atom has the same number of protons but a different number of neutrons compared to the common form of that atom. This results in isotopes having the same chemical properties but different atomic masses.
Isotopes are atoms of the same element but having a different number of neutrons.
We call these different "flavors" of an element the isotopes of that element.
Isotopes of an element differ from each other by having different numbers of neutrons. For example: 1H (hydrogen), 2H (deuterium), 3H (tritium) are isotopes. They have the same number of protons (1) but different numbers of neutrons (0, 1, and 2 respectively).
isotopes
Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. An example is carbon-12 and carbon-14, which both have six protons but differ in the number of neutrons they possess.
An isotope is a type of an atom of a chemical element having a different number of neutrons.
The neutron; the proton determines the element of the atom, but different atoms of the same element can have different atomic masses, due to the different number of neutrons of the atoms. Atoms of same element having same number of protons but different number of neutrons are called Isotopes. Thus, neutron determines the isotope of an atom.