ICSE Class 10 Radioactivity MCQ Semester 2
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Q1: The neutral atoms of all isotopes of the same element contain the same number of __________.
- neutrons only.
- Mass numbers
Q2: The atomic number is not changed by which type of radioactive decay?
- The atomic number is affected by all forms of radioactive decay
Q3: Isotopes of an element have a different number of
Q4: Three types of radioactive elements are emitted when unstable nuclei undergo radioactive decay. Which of the following is not one of them
Q5: A nuclear fission reaction becoming self-sustaining depends on
Q6: Helium nuclei particles are called
- Gamma particles
- Beta particles
- Alpha particles
- No particles that are helium nuclei
Q7: When two atomic nuclei combine it is called as
- Chain reaction
- Nuclear fusion
- Nuclear decay
- Nuclear fission
Q8: The number of protons or atomic number is reduced to 2 by which form of radioactive decay?
- Gamma decay
- Alpha decay
- None of the above
Q9: Which statement is true for all three types of radioactive emission?
- They are deflected by electric fields
- They ionise gases
- They are completely absorbed by a thin aluminium sheet
- They emit light
Q10: A nuclide of the element plutonium 94 Pu 242. What is the number of neutrons in its nucleus?