## Practice MCAT Question - Q19 - Answer!

**What is the charge on a body that has an excess of 20 electrons?**

A. 3.2 x 10

^{-18}C
B. 1.6 x 10

^{-18}C
C. 3.2 x 10

^{-19}C
D. 2.4 x 10

^{-19}C*The correct answer is (A). The elementary charge e is 1.6 x 10*

^{-19}C. Therefore, 20 electrons have a total magnitude of:

*20(1.610*

^{-19}C) = 3.2 x 10^{-18}C**Check The Sidebar For Another**

**Practice MCAT Question**

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