<P> A nuclide is a species of an atom with a specific number of protons and neutrons in the nucleus , for example carbon - 13 with 6 protons and 7 neutrons . The nuclide concept ( referring to individual nuclear species ) emphasizes nuclear properties over chemical properties , whereas the isotope concept ( grouping all atoms of each element ) emphasizes chemical over nuclear . The neutron number has large effects on nuclear properties , but its effect on chemical properties is negligible for most elements . Even in the case of the lightest elements where the ratio of neutron number to atomic number varies the most between isotopes it usually has only a small effect , although it does matter in some circumstances ( for hydrogen , the lightest element , the isotope effect is large enough to strongly affect biology ) . The term isotopes ( originally also isotopic elements , now sometimes isotopic nuclides ) is intended to imply comparison ( like synonyms or isomers ) , for example : the nuclides , , are isotopes ( nuclides with the same atomic number but different mass numbers ) , but Ar , , Ca are isobars ( nuclides with the same mass number ) . However , because isotope is the older term , it is better known than nuclide , and is still sometimes used in contexts where nuclide might be more appropriate , such as nuclear technology and nuclear medicine . </P>
<P> A nuclide is a species of an atom with a specific number of protons and neutrons in the nucleus , for example carbon - 13 with 6 protons and 7 neutrons . The nuclide concept ( referring to individual nuclear species ) emphasizes nuclear properties over chemical properties , whereas the isotope concept ( grouping all atoms of each element ) emphasizes chemical over nuclear . The neutron number has large effects on nuclear properties , but its effect on chemical properties is negligible for most elements . Even in the case of the lightest elements where the ratio of neutron number to atomic number varies the most between isotopes it usually has only a small effect , although it does matter in some circumstances ( for hydrogen , the lightest element , the isotope effect is large enough to strongly affect biology ) . The term isotopes ( originally also isotopic elements , now sometimes isotopic nuclides ) is intended to imply comparison ( like synonyms or isomers ) , for example : the nuclides , , are isotopes ( nuclides with the same atomic number but different mass numbers ) , but Ar , , Ca are isobars ( nuclides with the same mass number ) . However , because isotope is the older term , it is better known than nuclide , and is still sometimes used in contexts where nuclide might be more appropriate , such as nuclear technology and nuclear medicine . </P>
a term that is used to describe ( only ) different nuclear forms of the same element is
a term that is used to describe ( only ) different nuclear forms of the same element is
nuclide
nuclide