Gagan asked in Science & MathematicsPhysics · 2 months ago

Physics Help!!?

The electric potential energy of an electron near a silicon nucleus (charge +14e) is −1.27 ✕ 10−16 J. What is the distance between the electron and the nucleus?

 

________m

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  • 2 months ago
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    −1.27 ✕10–16 = –12.7–16 = –28.7 J. ??

    1 electron charge = 1.602e-19 C

    Potential energy between two charges, in Joules

    U = kQ₁Q₂/r

       Q₁ and Q₂ are the charges in coulombs

       r is separation in meters

       k = 8.99e9 Nm²/C²

    (9e9)(1.602e-19)(14•1.602e-19) / d = 28.7

    d = (9e9)(1.602e-19)(14•1.602e-19) / 28.7 = _____ m

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