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Q: Which one of the following elements is used as a timekeeper in atomic clocks?... | CDS I 2018 PYQ | UPSCGPT
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CDS I 2018
Question #523
Chemistry
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Which one of the following elements is used as a timekeeper in atomic clocks?
A
Potassium
B
Caesium
C
Calcium
D
Magnesium
Pick an option above to test your answer
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Subject:
Science & Technology
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