What is the value of one electron-volt in joules?
Correct answer C. 1.6 × 10⁻¹⁹ J
Explanation
One electron-volt is the energy gained by an electron moving through 1 V: W = qV = 1.6 × 10⁻¹⁹ C × 1 V = 1.6 × 10⁻¹⁹ J.
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