How many alpha particles are needed to produce a total charge of 2.5 * 10^-12 C? (Hint: Each alpha particle contains two protons.) A)7.8 Million B)1.6 * 10^-19 C)2 D)839 E)4.2 * 10¹³

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Quizplus · Accepted Answer

The charge of one alpha particle, which contains two protons, is $2 \times 1.6 \times 10^{-19} C$. To find the number of alpha particles needed for a total charge of $2.5 \times 10^{-12} C$, divide the total charge by the charge of one alpha particle: $\frac{2.5 \times 10^{-12}}{2 \times 1.6 \times 10^{-19}} \approx 7.8 \times 10^6$, which is 7.8 million.

How Many Alpha Particles Are Needed to Produce a Total