the radioactive isotope europium decays with a first order rate constant of 0.062 year-1. What fraction of the europium in a sample is still present 55.0 years later

0.033

Explanation:

From;

N/No = e^-kt

N/No = fraction of radioactive material left.

k= decay constant

t= time

N/No = e^-0.062 ×55

N/No = 0.033

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explanation:

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there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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