What is the difference between cesium-134 and cesium-137?
A. Same atomic number, different mass number
B. Different atomic number, same mass number
C. Different atomic number, different mass number,
D. Same atomic number, same mass number
Question & Answer
What is the difference between cesium-134 and cesium-137
2 Answers
Verified archiveA. Same atomic number, different mass number
Atomic number give atoms their identity – same number of protons
Different mass numbers, number after hyphen tells us their unique cases –>in this case, they are isotopes
The correct answer is:
A. Same atomic number, different mass number
Cesium-134 and cesium-137 are isotopes of the element cesium, meaning they have the same atomic number (number of protons) but different mass numbers (total number of protons and neutrons).