Answer: Isotopes of an atom are different because they have different atomic masses and different number of neutrons within their nucleus. They are the same since they will always have the same atomic number/number of protons in their nucleus.
Explanation:
Answer:

Explanation:
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In this case, for a first-order reaction, we can firstly compute the rate constant from the given half-life:

In such a way, the integrated first-order law, allows us to compute the final mass of the substance once 10.0 minutes (600 seconds) have passed:

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Carbon atoms are extremely small and are one of the only atoms that are structurally stable enough to form various different kinds of macromolecules.