Welcome to the Community College of the Air Force (CCAF). Our college is a federally-chartered degree-granting institution that serves the United States Air Force's enlisted total force.
Isotopes of an element have nuclei with the same number of protons (the same atomic number) but different numbers of neutrons. Therefore, isotopes have different mass numbers, which give the total number of nucleons-the number of protons plus neutrons.
ISOTOPES Nuclei of the same element having same atomic number but different mass number are known as isotopes. OR Nuclei of same element having same number of proton but different number of neutron are knows as isotopes. Example 17Cl35, 17Cl37 6C12, 6C13 ISOTOPES OF HYDROGEN There are three isotopes of hydrogen.