Antimony has two naturally occurring isotopes. Their abundance is given in the pic attached below
Answer:
<h2>B i have to search it like 23 hours to find it but Thank you for sharing your question :)</h2>
He can conclude that his experiment has very low precision.
<h3>What is Precision ?</h3>
Precision is defined as the degree of refinement with which an operation is performed or a measurement .
Precision is how close the exact answers are together.
As, the answers are increasing in time.
None of the answers are similar to one another.
Hence, He can conclude that his experiment has very low precision.
Learn more about Precision here ;
brainly.com/question/27845433
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