What is radiotherapy? Why is the study of radioactivity labeled nuclear chemistry? When an atom emits radiation, "A. How was the nucleus of an atom discovered?
Question 4e0c6. Question See all questions in Nuclear Chemistry. Nuclear reactions are very different from chemical reactions. In chemical reactions, atoms become more stable by participating in a transfer of electrons or by sharing electrons with other atoms. In nuclear reactions, it is the nucleus of the atom that gains stability by undergoing a change of some kind. The energies that are released in nuclear reactions are many orders of magnitude greater than the energies involved in chemical reactions.
Unlike chemical reactions, nuclear reactions are not noticeably affected by changes in environmental conditions, such as temperature or pressure.
As the following Sections will discuss, there are three main forms of radioactive emissions. An alpha particle is composed of two protons and two neutrons, and so it is the same as a helium nucleus. We can represent the emission of an alpha particle with a nuclear equation —for example, the alpha-particle emission of uranium is as follows:. Chemists often use the names parent isotope and daughter isotope to represent the original atom and the product other than the alpha particle.
When one element changes into another in this manner, it undergoes radioactive decay. Nuclear fission releases a tremendous amount of energy while nuclear fusion requires very high temperatures and releases more energy than nuclear fission. The Sun has been a source of energy since ancient times. Do you know what is the reason behind continuous emission of energy from the Sun?
Answer is that a nuclear fusion reaction takes place in the Sun which emits a tremendous amount of energy. Let us first discuss what is chemical reaction and nuclear reaction in brief then we will discuss the difference between chemical reaction and nuclear reaction in detail. Image will be uploaded soon. A chemical reaction is the process in which reactants react chemically and convert into products by chemical transformation.
For example — Respiration — we inhale oxygen which reacts with glucose and produces carbon dioxide, water and energy. Equation of respiration reaction a chemical reaction is given below —. General form of Chemical Reaction can be written as follows —.
Reactants Products. While when water liquid converts into ice no chemical change takes place, so it is not a chemical reaction. Chemical reactions are of many types such as addition reaction, combustion reaction, neutralization reaction, displacement reaction, decomposition reaction and precipitation reaction etc. Nuclear reactions release a tremendous amount of energy.
Nuclear fission and nuclear fusion are two types of nuclear reactions. Humans have been able to control nuclear fission, but the amount of energy released in nuclear fusion is very large and we have not been able to control it till now. Some research is going on, but it is still years away from any practical application. Nuclear fusion takes place in the Sun. Sun has been the source of energy since the birth of the solar system. We use nuclear reactions to generate energy at large scale.
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