The smallest unit of charge is –1.6 × 10¬19 C, which is the charge in coulombs of a single electron. Robert Millikan was able to measure the charge on small droplets of oil by suspending them between a pair of electrically charged plates. Which of the values are possible charges of those oil droplets? -3.2 x 10-19 C -1.2 x 10-19 C -5.6 x 10-19 C

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