The table below shows the number of protons, neutrons, and electrons in four ions.Which ion has a

June 2018 NY Regents Chemistry Exam

33 The table below shows the number of protons, neutrons, and electrons in four ions.

Which ion has a charge of 2-?

(1) A
(2) E

(3) G

(4) J

Solution: An electron has a charge of -1. A proton has a charge of +1. A neutron has a charge go 0. To have a 2- charge an ion must have two more electrons than protons.

Answer: 1

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