Chapter 19: Problem 66
How are scientists able to tell the age of a fossil?
Chapter 19: Problem 66
How are scientists able to tell the age of a fossil?
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Get started for freeDefine nuclear binding energy, mass defect, and nucleon.
Both barium (Ba) and radium (Ra) are members of Group \(2 \mathrm{~A}\) and are expected to exhibit similar chemical properties. However, \(\mathrm{Ra}\) is not found in barium ores. Instead, it is found in uranium ores. Explain.
A radioactive substance undergoes decay as follows: $$\begin{array}{cc}\hline \text { Time (days) } & \text { Mass (g) } \\\\\hline 0 & 500 \\\1 & 389 \\\2 & 303 \\\3 & 236 \\\4 & 184 \\\5 & 143 \\\6 & 112 \\\\\hline\end{array}$$ Calculate the first-order decay constant and the halflife of the reaction.
A long-cherished dream of alchemists was to produce gold from cheaper and more abundant elements. This dream was finally realized when \({ }_{80}^{198} \mathrm{Hg}\) was converted into gold by neutron bombardment. Write a balanced equation for this reaction.
Why is strontium-90 a particularly dangerous isotope for humans?
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