A helium atom, a hydrogen atom and a neu...

A helium atom, a hydrogen atom and a neutron have mases of` 4.003 u, 1.008 u` and `1.009 u` (unified atomic mass units), respectively. Assuming that hydogen atoms and neutrons can be fuse to from helium, what is the binding energy of a helium nucleus?

`2.01 u`

`3.031 u`

`1.017 u`

`0.031u`

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The correct Answer is:

Refer to the defination of mass defect.

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