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## Homework Statement

*"Calculate how much energy that is required for a oxygen atom*"

^{16}_{8}O to split it up into 4 α-particles## The Attempt at a Solution

1: (8 * 1,00727646688)u + (8* 1,00866491578)u = 16,12753105 u

The first one is the Oxygen's 8 protons and the second one is its 8 neutrons.

2:

^{16}O = 15,994915 u (Taken from a schedule)

We also have to discount the 8 electrons: 15,994915 u - (8 * 0,00054858) u = 15,99052636 u

3: 16,12753105 u - 15,99052636 u = 0,1370146888 u

That'd be the mass defect.

How do I then proceed? What should I do next? I'm a bit confused.

The answer is 14 MeV.

Thank you