Question

An object has an deficiency of 2.0 x 1025 electrons. The order of magnitude for the charge on this object in coulombs is
(1) 25 (2) -19 (3) 6 (4) -45

Proof: Explain your reasoning/show calculations.

Answer 1

$$q=-ne=(2.0\cdot10^{25})(1.6\cdot10^{-19})=3.2\cdot10^{6}C$$