Chemistry
NULL
Medium
Question
The number of isotopes of elements with even mass number and even atomic number are ________________?
A
280
B
300
C
154
✓ Official correct answer
D
54
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A
280
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B
300
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C
154
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D
54
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Explanation
Among known isotopes, those with both an even mass number and an even atomic number number around 154, reflecting the greater nuclear stability of even-even nuclides.
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