The ore of uranium found in nature contains `""_(92)U^(238)and""_(92)U^(235)`. Although both the isotopes are fissionable, it is found out experimentally that one of the two isotopes is more easily fissionable.
Write a nuclear reaction when Uranium 238 emits an alpha particle to form a Thorium (Th) nucleus.

Explanation

To write the nuclear reaction for the emission of an alpha particle from Uranium-238 to form a Thorium nucleus, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Initial Nucleus**: We start with Uranium-238, which is denoted as \( _{92}^{238}U \).

2. **Understand Alpha Particle Emission**: An alpha particle is composed of 2 protons and 2 neutrons, which can be represented as \( _{2}^{4}He \) or simply \( \alpha \).

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