Both Xenon and Cesium each have a number of known isotopes close to:
Correct answer: B. 36
- A. 12
- B. 36
- C. 33
- D. 39
Explanation
Xenon and Caesium are elements with a large number of known isotopes, both natural and artificially produced. Scientific data shows that each of these elements has over 36 identified isotopes.
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