The force of attraction between an electron and a proton in a hydrogen atom is 1.60E-8 N. To find this result, start by laying down the known data:
The charge of an electron and a proton is the same, with opposite sign, and equal to qe = -qp = -1.602176634E-19 C.
The distance between electron and proton in a hydrogen atom is approximately 0.120 nm = 120E-12 m.
Find the force with the following formula:
F = ke × qe × qp/r² = - 8.988E9 × (1.602176634E-19)²/(120E-12)² = 1.60E-8 N
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