The atomic mass of uranium `._(92)^(238)U` is `238.0508 u`, that of throium` ._(90)^(234)Th` is `234.0436 u` and that of an alpha particle `._2^4He` is `4.006 u`, Determine the energy released when `alpha-decay` converts`._(92)^(238)U` into `._(90)^(234)Th`.

Explanation

To determine the energy released when uranium-238 undergoes alpha decay to form thorium-234, we can follow these steps:

### Step 1: Write the decay reaction
The alpha decay of uranium-238 can be represented as:
\[ _{92}^{238}U \rightarrow _{90}^{234}Th + _{2}^{4}He \]
This shows that uranium-238 decays into thorium-234 and an alpha particle (helium-4).
...