Do you mean ISOTOPE? an isotope is a from of an element which has the same number of protons and electrons but a different number of neutrons. examples: chlorine (Cl) has an atomic massof 35.5 because of its isotopes. the same is apparent of bromine.
They are not. Atomic number is the total number of protons in an atom. Mass number is the total number of protons and neutrons. The only isitope in which they are the same is Hydrogen-1 with 1 proton and no neutrons.
The atomic number of an element is determined by the number of protons in its nucleus. In this case, the isotope In-115 refers to indium with 115 protons. Therefore, the atomic number of isotope In-115 is 49.
Applications of plutonium: • explosive in nuclear weapons • nuclear fuel in nuclear power reactors • the isotope 238Pu is used as energy source in spacecrafts or other applications (radioisotope thermoelectric generators) • neutron generator, as Pu-Be source