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In a Millikan's oil drop experiment, six...

In a Millikan's oil drop experiment, six oil drops were observed to have charges of `16xx10^(-19) C`, `8.0xx10^(-19)`C, `6.4xx10^(-19)` C, `2.4xx10^(-18)`C and `3.2xx10^(-18)` C, respectively. What conclusion can be drawn from these observations ?

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