Europium or has the symbol of Eu contains 89 neutrons on
it. And its Isotopes mass number is 150.9198502. According to research the
naturally occurring Eu is consist of 2 isotopes. Eu 151 is considered as one of
the most abundant in nature. Europium -155 is said to have a half-life of 4.76years.
It produces 252 KeV decay energy.
