Answer :
Final answer:
Europium consists of two naturally occurring isotopes: Eu-151 and Eu-153, with an abundance of 48.03% for Eu-151.
Explanation:
Europium (Eu) naturally occurs in two isotopes: Eu-151 and Eu-153. The abundance of Eu-151 is 48.03%. This means that out of all the europium atoms found in nature, 48.03% are Eu-151 and the remaining percentage is Eu-153.
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