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Chapter 21: Problem 1

How do nuclear reactions differ from ordinary chemical reactions?

Short Answer

Expert verified
Nuclear reactions involve changes in the nucleus of an atom and can change one element into another, often releasing large amounts of energy. Chemical reactions, on the other hand, involve a rearrangement of electrons within an atom and occur on the electron shell; they can't transform one element to another. Hence, the key differences lie in where the reaction takes place (nucleus versus electron shell), the possibility of elemental transformation, and the amount of energy released.

Step by step solution

01

Understanding Chemical Reactions

Chemical reactions occur when two substances interact to form new substances. This process involves the rearrangement of atoms and the breaking and forming of new chemical bonds between these atoms. These reactions only affect the arrangements of electrons in an atom as they occur in the electron shell.
02

Understanding Nuclear Reactions

A nuclear reaction involves changes in the nucleus of an atom. Unlike chemical reactions, nuclear reactions can change one element into another. In these reactions, there is a change in the protons or neutrons in the atom's nucleus. This often involves the release of a large amount of energy.
03

Distinguishing Between the Two

The major differences between nuclear and chemical reactions include the following: In chemical reactions, atoms are changed by reconfiguring the electrons, while in nuclear reactions, atoms are changed by altering the protons or neutrons in the nucleus. Additionally, nuclear reactions release much more energy compared to chemical reactions. Lastly, nuclear reactions can change an element into an entirely different element, a transformation that doesn鈥檛 occur in chemical reactions.

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Most popular questions from this chapter

Which of the following poses a greater health hazard: a radioactive isotope with a short half-life or a radioactive isotope with a long half-life? Explain. [Assume same type of radiation \((\alpha\) or \(\beta)\) and comparable energetics per particle emitted.

The radioactive potassium- 40 isotope decays to argon- 40 with a half-life of \(1.2 \times 10^{9}\) yr. (a) Write a balanced equation for the reaction. (b) A sample of moon rock is found to contain 18 percent potassium40 and 82 percent argon by mass. Calculate the age of the rock in Years.

Sources of energy on Earth include fossil fuels, geothermal, gravitational, hydroelectric, nuclear fission, nuclear fusion, solar, and wind. Which of these have a "nuclear origin," either directly or indirectly?

(a) Assume nuclei are spherical in shape, show that its radius \((r)\) is proportional to the cube root of mass number \((A) .\) (b) In general, the radius of a nucleus is given by \(r=r_{0} A^{\frac{1}{3}},\) where \(r_{0},\) the proportionality constant, is given by \(1.2 \times 10^{-15} \mathrm{~m}\). Calculate the volume of the \({ }^{238} \mathrm{U}\) nucleus.

Tritium contains one proton and two neutrons. There is no proton-proton repulsion present in the nucleus. Why, then, is tritium radioactive?
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