In 1960, which isotope was used to define the standard measure of length (the meter)? MCQ Questions & Answers | All Govt Exams Practice
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📝 Multiple Choice Question General-science

In 1960, which isotope was used to define the standard measure of length (the meter)?

A Krypton-86
B Krypton-88
C Krypton-83
D Krypton-90

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