Radioactive Decay
Chemistry ⇒ Nuclear Chemistry
Radioactive Decay starts at 10 and continues till grade 12.
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See sample questions for grade 10
Describe the difference between alpha, beta, and gamma radiation in terms of their composition.
Describe the main difference between natural and artificial radioactive isotopes.
Describe what happens to the atomic number and mass number during beta-minus decay.
Describe what happens to the atomic number and mass number of an atom when it undergoes alpha decay.
Explain why alpha particles are less penetrating than beta or gamma radiation.
Explain why gamma rays are often emitted along with alpha or beta particles during radioactive decay.
A sample of a radioactive isotope decays from 100 g to 12.5 g in 3 days. What is the half-life of the isotope?
A scientist observes that a radioactive sample loses 75% of its activity in 6 hours. What is the half-life of the sample?
What is the charge of a beta particle? (1) +2 (2) -1 (3) 0 (4) +1
Which of the following best describes a radioactive isotope? (1) An atom with a stable nucleus (2) An atom with an unstable nucleus (3) An atom with no neutrons (4) An atom with no electrons
Which of the following is a common unit used to measure radioactivity? (1) Meter (2) Becquerel (3) Joule (4) Kelvin
Which of the following is a correct statement about the products of beta decay? (1) The mass number increases by 1 (2) The atomic number decreases by 1 (3) The atomic number increases by 1 (4) The mass number decreases by 2
Fill in the blank: The emission of a beta particle from a nucleus results in the atomic number ________ by one.
Fill in the blank: The emission of a positron from a nucleus is called ________ decay.
Fill in the blank: The emission of energy as electromagnetic waves or as moving subatomic particles is called ________.
Fill in the blank: The process by which a neutron in the nucleus is converted into a proton and an electron is called ________ decay.
True or False: All isotopes of an element are radioactive.
True or False: Beta decay increases the atomic number of the nucleus by one.
True or False: In alpha decay, the nucleus emits a particle containing two protons and two neutrons.
True or False: Radioactive decay always results in the emission of particles.
