/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 151 When \({ }_{3} \mathrm{Li}^{7}\)... [FREE SOLUTION] | 91影视

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Chapter 19: Problem 151

When \({ }_{3} \mathrm{Li}^{7}\) nuclei are bombarded by protons, and the resultant nuclei are \({ }_{4} \mathrm{Be}^{8}\), the emitted particles will be (A) Alpha particles (B) Beta particles (C) Gamma photons (D) Neutrons

Short Answer

Expert verified
None of the given options (A to D) is the correct answer, as the reaction involves an increase in proton count due to bombardment without emitting any of the listed particles.

Step by step solution

01

Understanding the pre-reaction configuration

The nucleus of \( {}_{3} \mathrm{Li}^{7} \) has 3 protons and 4 neutrons (since the symbol represents the isotopes with 3 protons and 7 nucleons (protons+neutrons)). Additionally, we are informed that these nuclei are bombarded by protons.
02

Understanding the post-reaction configuration

The nucleus of \( {}_{4} \mathrm{Be}^{8} \) has 4 protons and 4 neutrons (remember that Be has 4 protons and 8 nucleons).
03

Observing the change in configuration

Comparing the pre and post configurations, we notice that the number of protons has increased by 1 (3 to 4). The number of neutrons remained the same (4 to 4). This means the extra proton from the bombardment has been added to the lithium nucleus, and as no neutron was lost, neutrons can be ruled out as the emitted particle.
04

Understanding the nature of different particles/phenomena

Alpha particles consist of 2 protons and 2 neutrons. Beta particles can be an electron or a positron that is emitted when a neutron in the nucleus is transformed into a proton or vice versa. Gamma photons are released as a form of electromagnetic energy when a nucleus is excited. In this reaction, no such transformations or excitations are taking place. Therefore, alpha particles, beta particles, and gamma photons can also be ruled out.
05

Identifying the emitted particle

From steps 3 and 4, we have effectively ruled out alpha particles, beta particles, gamma photons, and neutrons as potential emitted particles. However, the exercise does not give an option that fits this result, as an increase in proton count due to bombardment does not typically involve the emission of a particle. This seems to be a trick question, and none of the given options (A to D) is the correct answer.

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