The isotopes of the same element have an identical number of protons and electrons; the number of neutrons is different.
Isotopes are atoms of the same elements with different number of neutrons.
Isotopes are forms of the same element that differ in Neutrons.
Isotopes of elements are atoms with the same number of protons but different numbers of neutrons. This causes isotopes of the same element to have different atomic masses. Isotopes can be stable or unstable, with unstable isotopes undergoing radioactive decay.
Since you have isotopes of elements. Isotopes are elements with different number of neutrons hence why the different atomic masses for the same elements.
Neutrons
neutrons
elements are isotopes, when different atoms of the same element have different number of neutrons
The answer you are looking for is "isotopes" HOWEVER, please note you CAN NOT HAVE 2 elements with the same number of PROTONS. This is because the number of protons DEFINES an element. Isotopes are the SAME element but with differing numbers of neutrons.
scientists Can tell the difference between two isotopes of the same element because, isotopes of the same elements always have the same number of protons.
The proton and electron number are equal for all isotopes of the same specific element.
Isotopes of the same element have the same number of protons, which is what defines an element. The only difference between isotopes is the number of neutrons in the nucleus. Since isotopes of an element have the same chemical properties, they are not considered different elements.
Many elements have different isotopes: 1) Carbon - Carbon 12, Carbon 14 2) Hydrogen - Protium, Deuterium, Tritium 3) Chlorine - Chlorine 35, Chlorine 37 etc