5.6.1: Practice Nuclear Chemistry

Last updated
Save as PDF

Page ID: 236039

\( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}} } \) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash {#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\)

Exercise \(\PageIndex{1}\)

What is the missing isotope in the reaction below? What type of reaction is it?

\[_{95}^{241}Am \rightarrow ? + _{2}^{4}He\]

Answer: \(_{93}^{237}Np\) It is alpha emission.

Exercise \(\PageIndex{1}\)

What is the missing isotope in the reaction below? What type of reaction is it?

\[_{28}^{58}Ni+_{1}^{1}H \rightarrow ? + _{2}^{4}He\]

Answer: \(_{27}^{55}Co\) It is nuclear bombardment.

Exercise \(\PageIndex{1}\)

What is the missing isotope in the reaction below? What type of reaction is it?

\[_{39}^{90}Y \rightarrow ? + _{–1}^{0}e\]

Answer: \(_{40}^{90}Zr\) It is beta emission.

Exercise \(\PageIndex{1}\)

What is the missing isotope in the reaction below? What type of reaction is it?

\[_{54}^{118}Xe \rightarrow ? + _{+1}^{0}e\]

Answer: \(_{53}^{118}I\) It is positron emission.

Exercise \(\PageIndex{1}\)

Two units used to measure absorbed dose of radiation are the rad and the gray (Gy). Their relationship is that 1 Gy = 100 rad, exactly. If a medical treatment involves the absorption of 0.45 krad, what is that in Gy?

Answer: 4.5 Gy

Exercise \(\PageIndex{1}\)

The units used to measure radioactivity of a sample are curies (Ci) or bequerel (Bq). Their relationship is that 1 Ci = 3.7 x 10¹⁰ Bq (2 sig dig relationship). If a radioactive sample is giving off 35 nCi, how many Bq is that?.

Answer: 1300 Bq

More Chapter 5 Practice

Exercise \(\PageIndex{1}\)

What is the missing isotope in the reaction below? What type of reaction is it?

\[_{24}^{51}Cr \rightarrow ? + _{–1}^{0}e\]

Answer: \(_{25}^{51}Mn\) It is beta emission.

Exercise \(\PageIndex{1}\)

What is the missing isotope in the reaction below? What type of reaction is it?

\[_{18}^{40}Ar+_{2}^{4}He \rightarrow ? + _{1}^{1}H\]

Answer: \(_{19}^{43}K\) It is nuclear bombardment.

Exercise \(\PageIndex{1}\)

What is the missing isotope in the reaction below? What type of reaction is it?

\[_{84}^{214}Po \rightarrow ? + _{2}^{4}He\]

Answer: \(_{82}^{210}Pb\) It is alpha emission.

Exercise \(\PageIndex{1}\)

What is the missing isotope in the reaction below? What type of reaction is it?

\[_{80}^{188}Hg \rightarrow ? + _{+1}^{0}e\]

Answer: \(_{79}^{188}Au\) It is positron emission.

Exercise \(\PageIndex{1}\)

Answer: 0.00075 Gy

Exercise \(\PageIndex{1}\)

How old (in weeks) is a sample of Ce-141 that has been around for 3.80 half-lives? The half-life of Ce-141 is 32.5 days.

Answer: 17.6 weeks