The atomic mass `. _2^4He` is `4.0026 u` and the atomic mass of `._1^1H` is `1.0078 u`. Using atomic mass units instead of kilograms, obtain the binding energy of `._2^4He` nucleus.

Explanation

To find the binding energy of the helium-4 nucleus (₂⁴He), we will follow these steps:

### Step 1: Identify the masses of the reactants and products
The atomic mass of helium-4 (₂⁴He) is given as 4.0026 u. The atomic mass of hydrogen (₁¹H) is given as 1.0078 u, and the mass of a neutron (₀¹n) is approximately 1.0087 u.

### Step 2: Write the nuclear reaction
The formation of the helium-4 nucleus can be represented by the reaction:
\[ 2 \, ^1H + 2 \, ^0n \rightarrow \, ^4He \]
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