Radioactive Decay
Chemistry ⇒ Nuclear Chemistry
Radioactive Decay starts at 10 and continues till grade 12.
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Describe the difference between natural and artificial radioactive isotopes.
Describe the difference between parent and daughter isotopes in radioactive decay.
Describe what happens to the atomic number and mass number of a nucleus during gamma decay.
Describe what is meant by the term 'radioactive series'.
Explain why alpha particles are less penetrating than beta particles or gamma rays.
Explain why radioactive decay is considered a first-order kinetic process.
Explain why some nuclei are unstable and undergo radioactive decay.
The equation N = N0e-λt is used to calculate the number of undecayed nuclei at time t. What does N0 represent?
Which of the following best describes the process of positron emission? (1) A neutron is converted into a proton (2) A proton is converted into a neutron (3) An electron is captured by the nucleus (4) A nucleus emits a gamma ray
Which of the following is a correct statement about the products of alpha decay? (1) The daughter nucleus has a mass number 2 less than the parent (2) The daughter nucleus has an atomic number 2 less than the parent (3) The daughter nucleus has a mass number 4 less than the parent (4) Both 2 and 3
Which of the following is a product of the alpha decay of 238U? (1) 234Th (2) 234Pa (3) 239Np (4) 238Pu
Which of the following is a property of gamma rays? (1) They have mass (2) They are electromagnetic waves (3) They have a positive charge (4) They are deflected by electric fields
The decay constant (λ) is related to the half-life (t1/2) by the equation t1/2 = ________.
The process by which a neutron in the nucleus is converted into a proton with the emission of an electron is called ________.
The process in which an inner orbital electron is captured by the nucleus is called ________.
The SI unit of radioactivity is the ________.
True or False: All isotopes of an element are radioactive.
True or False: Beta decay can increase or decrease the atomic number of a nucleus by one.
True or False: In alpha decay, the mass number of the nucleus decreases by 4 and the atomic number decreases by 2.
True or False: The activity of a radioactive sample is directly proportional to the number of undecayed nuclei present.
