Which element of the following on disintegration leads to daughter element in gaseous form
**Core Concept**
Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thus transforms or 'decays' into a different atom with a mass number that is reduced by four and an atomic number that is reduced by two. This process can result in the emission of a gaseous daughter element.
**Why the Correct Answer is Right**
Alpha decay occurs when an unstable nucleus has too many protons or too many neutrons, leading to an imbalance in the nuclear forces. As a result, the nucleus emits an alpha particle to achieve stability. The alpha particle is a helium nucleus consisting of two protons and two neutrons, which is emitted in a gaseous form. This process is characteristic of certain isotopes of heavy elements, such as uranium and thorium.
**Why Each Wrong Option is Incorrect**
* **Option A:** Not applicable, as this option is missing.
* **Option B:** This might refer to beta decay, where a neutron is converted into a proton and an electron, but it does not result in a gaseous daughter element.
* **Option C:** This might refer to gamma decay, where a nucleus releases energy as gamma rays, but it does not result in a change of the nucleus or the emission of a gaseous element.
**Clinical Pearl / High-Yield Fact**
Alpha decay is a common mode of radioactive decay in certain isotopes of heavy elements, and it can be used to generate electricity in nuclear power plants through the process of nuclear fission.
**Correct Answer: C. This option might refer to gamma decay, but the correct answer is actually not provided in the question.