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Chapter 21: Problem 9

Indicate the number of protons and neutrons in the following nuclei: \((\mathbf{a}) _{24}^{56} \mathrm{Cr},(\mathbf{b})^{193} \mathrm{Tl},(\mathbf{c})\) argon-\(38.\)

Short Answer

Expert verified
a. Chromium-56: \(24\) protons and \(32\) neutrons. b. Thallium-193: \(81\) protons and \(112\) neutrons. c. Argon-38: \(18\) protons and \(20\) neutrons.

Step by step solution

01

a. Chromium-56

The atomic number for Chromium is 24 (notated as the lower number), which means it has 24 protons. To find the number of neutrons, we subtract the atomic number from the mass number (56 - 24), which gives us 32 neutrons.
02

b. Thallium-193

First, we need to determine the atomic number for Thallium, which is 81. This can be found in a periodic table. With the atomic number 81, Thallium has 81 protons. To find the number of neutrons, we subtract the atomic number from the mass number (193 - 81), giving us 112 neutrons.
03

c. Argon-38

The atomic number for Argon is 18 (notated as the lower number), which means it has 18 protons. To find the number of neutrons, we subtract the atomic number from the mass number (38 - 18), which gives us 20 neutrons.

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Most popular questions from this chapter

Write balanced equations for each of the following nuclear reactions: \((\mathbf{a}) _{92}^{238} \mathrm{U}(\mathrm{n}, \gamma)_{92}^{239} \mathrm{U},\) \((\mathbf{b})_{8}^{16} \mathrm{O}(\mathrm{p}, \alpha)_{7}^{13} \mathrm{N},\) \((\mathbf{c})_{8}^{18} \mathrm{O}\left(\mathrm{n}, \beta^{-}\right)_{9}^{19} \mathrm{F}.\)

The diagram shown here illustrates a fission process. \begin{equation} \begin{array}{l}{\text { (a) What is the unidentified product of the fission? }} \\ {\text { (b) Use Figure } 21.2 \text { to predict whether the nuclear products }} \\ \quad {\text { of this fission reaction are stable. [ Section } 21.7 ]}\end{array} \end{equation}

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Write balanced nuclear equations for the following processes: \((\mathbf{a})\) rubidium-90 undergoes beta emission; \((\mathbf{b})\) selenium- 72 undergoes electron capture; \((\mathbf{c})\) krypton-76 undergoes positron emission; \((\mathbf{d})\) radium-226 emits alpha radiation.

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