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Question

# Rank the following in order from the most energy released to the least energy released: (a) uranium-235 splitting into two equal fragments, (b) uranium-235 splitting into three equal fragments, (c) uranium-235 splitting into 92 equal fragments.

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The energy released in the fission reaction depends on mass of the nucleons against their atomic number as shown in the Figure 13.30. We know that uranium-235 has an atomic number of 92. Let's look into each case and see the atomic numbers of fragments produced.

(a) Splitting into 2 fragments:

Splitting uranium into two equal fragments will produce two nuclei with an atomic number of about 46 each.

(b) Splitting into 3 fragments:

Splitting uranium into three equal fragments will produce three nuclei with an atomic number of about 31 each.

(c) Splitting into 92 fragments:

Splitting uranium into three equal fragments will produce 92 nuclei with an atomic number of about 1 each.

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