Question detail
Which of the following correctly describes alpha decay?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Atoms and nuclear radiation
Question
- A. Emission of a high-speed electron
- B. Emission of a helium nucleus
- C. Emission of electromagnetic radiation
- D. Emission of neutrons
Answer
Emission of a helium nucleus
Explanation
Alpha decay involves the emission of an alpha particle, which is a helium nucleus consisting of 2 protons and 2 neutrons.
Common mistake
Common Mistake in Alpha Decay Explanation
Students often state that alpha decay decreases the mass number by 2 and the atomic number by 4.
Remember that alpha decay decreases the mass number by 4 and the atomic number by 2. Use the correct values when explaining the changes in the nucleus.
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