An ion has 109 neutrons, 87 protons and 84 electrons. What is the net charge in Coulombs on the ion?

4.8E-19C

Explanation:

Charge is calculated by getting the net sum of protons and electrons

So

87protons - 84electrons= +3

So the charge of the ion is +3

But 1proton= 1.6*10^-19C

So charge will be 3 x 1.6E-19C

4.8x10^-19C

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