How many extra electrons reside on each pith ball? The charge of an electron is -1.602 x 10⁻¹⁹ C.
a) Charge on pith ball/Charge of an electron
b) Charge on pith ball × Charge of an electron
c) Charge on pith ball/Number of electrons
d) Charge on pith ball ÷ Charge of an electron

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