they have different mass number and number of neutrons
protium consists of mass number 1 and have one neutron
deutrium consists of mass number 2 and have two neutrons
tirtium consists of 3 neutrons and have mass number 3
the difference in mass number is due to difference in neutrons.
The number of neutrons is different for each isotope.
Each isotope of beryllium has a different number of neutrons.
The number of neutrons is different for each isotope.
Each atom of an isotope of beryllium (or of another element) is different from the atoms of an other isotope. But all the atoms of an isotope are identical.
This is important because each isotope has different properties.
Each isotope has a different number of neutrons.Number of neutrons = Mass number of an isotope - 91
Each isotope has a different number of neutrons.Number of neutrons = Mass number of an isotope - 91
Each isotope has a different number of neutrons.Number of neutrons = Mass number of an isotope - 91
Because each isotope of an element has a mass different from any other isotope of the same element, and the atomic mass of an element is an average, weighted by the proportion of each isotope, in the naturally occurring element.
The number of neutrons is different for each isotope. Number of neutrons = Atomic mass of an isotope - 104
For each isotope the number of neutrons is different. Number of neutrons = Mass number of an Tc isotope - 43
For each isotope the number of neutrons is different. Number of neutrons = Mass number of an isotope - 104