Select the correct statements among the following:
A. Slow neutrons can cause fission in \( \frac{235}{92}U \) more effectively than fast neutrons.
B. \( \alpha \)-rays are Helium nuclei.
C. \( \beta \)-rays are fast moving electrons or positrons.
D. \( \gamma \)-rays are electromagnetic radiations with wavelengths larger than X-rays.
Choose the answer from the options given below:
A. Slow neutrons can cause fission in \( \frac{235}{92}U \) more effectively than fast neutrons.
B. \( \alpha \)-rays are Helium nuclei.
C. \( \beta \)-rays are fast moving electrons or positrons.
D. \( \gamma \)-rays are electromagnetic radiations with wavelengths larger than X-rays.
Choose the answer from the options given below:
- A, B and C only
- A, B and D only
- A and B only
- C and D only
The Correct Option is A
Solution and Explanation
Let's evaluate each statement:
A. Slow neutrons are more effective in causing nuclear fission in $^{235}_{92}$U than fast neutrons because they have a higher probability of interaction with the uranium nucleus. This statement is correct.
B. α-rays consist of two protons and two neutrons; they are identical to Helium nuclei. This statement is correct.
C. β-rays are high-speed electrons − or positrons+ emitted during radioactive decay. This statement is correct.
D. γ-rays are electromagnetic radiation with wavelengths shorter than X-rays. This statement is incorrect.
Therefore, statements A, B, and C are correct.
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