Question detail
What is the atomic number of an alpha particle, and how does it affect the atomic number of the original nucleus after alpha decay?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Atoms and nuclear radiation
Question
What is the atomic number of an alpha particle, and how does it affect the atomic number of the original nucleus after alpha decay?
Answer
An alpha particle has an atomic number of 2. When an unstable nucleus undergoes alpha decay, it loses 2 protons, resulting in a decrease of the atomic number by 2.
Explanation
This question assesses the student's understanding of alpha decay and its impact on atomic structure. A strong answer clearly identifies the atomic number of the alpha particle and explains the resulting change in the original nucleus's atomic number.
Common mistake
Common Mistake in Balancing Atomic Numbers
Students often forget to adjust both the mass number and atomic number when balancing nuclear equations, leading to incorrect representations of decay processes.
Always ensure that both the mass number and atomic number are balanced on both sides of the equation. Check that the total atomic number of reactants equals that of the products.
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