The atomic mass of a neutral atom is

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Modern Physics · Modern Physics

Problem

The atomic mass of a neutral

^4\text{He}

atom is

4.002603\,\text{u}

. Given

m_p = 1.007276\,\text{u}

m_n = 1.008665\,\text{u}

and

m_e = 0.000548\,\text{u}

, calculate the mass defect of the

^4\text{He}

nucleus in atomic mass units (u).