Krypton (Kr) is a noble gas with atomic number 36. It has several isotopes, which are variants of the element that have the same number of protons but different numbers of neutrons. The most notable isotopes of krypton include: 1. **Krypton-78 (Kr-78)**: This isotope has 42 neutrons and is stable. 2. **Krypton-80 (Kr-80)**: This stable isotope has 44 neutrons.
Krypton-85 (Kr-85) is a radioactive isotope of the element krypton, which is a noble gas. It has a mass number of 85, meaning it has 36 protons and 49 neutrons in its nucleus. Krypton-85 is produced naturally in the atmosphere through the interaction of cosmic rays with stable krypton isotopes and is also released into the environment from certain human activities, primarily from nuclear reactors and radiological applications.
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