21. Nuclear Chemistry

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Multiple Choice

Identify the missing species from the following nuclear reaction.

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Write a nuclear equation for the indicated decay of each nuclide.

d. O-15 (positron emission)

Write balanced nuclear equations for the following processes:

(b) selenium-72 undergoes electron capture.

Write balanced nuclear equations for the following transformations:

(b) nitrogen-13 undergoes electron capture.

Complete and balance the following nuclear equations.

(d) <ISOTOPE CHEM REACTION>

Write balanced nuclear equations for the following processes.

(d) Positron emission of 165Ta

The steps below show three of the steps in the radioactive decay chain for 23290Th. The half-life of each isotope is shown below the symbol of the isotope. (d) The next step in the decay chain is an alpha emission. What is the next isotope in the chain? [Sections 21.2 and 21.4]

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Give the symbol for (c) a positron.

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Write balanced nuclear equations for the following processes: (c) krypton-76 undergoes positron emission.

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Write balanced nuclear equations for the following transformations: (c) technicium-98 undergoes electron capture.

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Decay of which nucleus will lead to the following products: (c) tantalum-179 by electron capture?

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Decay of which nucleus will lead to the following products: (b) chromium-50 by positron emission?

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Positron emission and electron capture both give a product nucleus whose atomic number is 1 less than the starting nucleus. Explain.

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Complete and balance the following nuclear equations. (d)

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Write a nuclear equation for the indicated decay of each nuclide. e. Cr-51 (electron capture)

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Write a nuclear equation for the indicated decay of each nuclide. d. N-13 (positron emission)

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What particle is produced by the decay of thorium-214 to radium-210?

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Write a nuclear equation for the indicated decay of each nuclide. e. Pd-103 (electron capture)

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What particle is produced in each of the following decay reactions? (a)

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What particle is produced in each of the following decay reactions? (c)

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Fill in the missing particles in each nuclear equation. c. 1911Ne ¡1910Ne + ____

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Write balanced nuclear equations for the following processes. (b) Electron capture of 138Sm

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Fill in the missing particles in each nuclear equation. d. 7535Br ¡ ____ + 0+1e

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Write balanced nuclear equations for the following processes. (b) Electron capture of 126Ba

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226Ac can decay by any of three different nuclear processes: a emission, b emission, or electron capture. Write a balanced nuclear equation for the decay of 226Ac by each process.

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The radioactive isotope 100Tc decays to form the stable iso-tope 100Mo. (a) There are two possible pathways for this decay. Write balanced equations for both.

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Open Question

When ⁵⁹Cu undergoes positron emission, what is the immediate nuclear product?