In Millikan’s experiment, static electric charge on the oil ...

NCERT Class XI Chemistry Structure of Atom Solutions

Question : 39 of 67

Marks: +1, -0

In Millikan’s experiment, static electric charge on the oil drops has been obtained by shining X-rays. If the static electric charge on the oil drop is – 1.282 × 10–18 C, what will be the number of electrons present on it?

Solution:

Charge of one electron = – 1.602 × 10–19 C
Number of electrons =

−1.282×10−18

−1.602×10−19

= 8

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