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
What is the difference between cesium-134 and cesium-137
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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).
A. 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