1.31 deduce the charge of an ion from the electronic configuration of the atom from which the ion is formed

FROM ELECTRONIC CONFIGURATION:

- It is easy to work out the charge from the electronic configuration mainly because you simply need to work out the quickest route. For example if an ion had an electronic configuration of 2.8.1 it is quicker for the atom to lose an electron rather than it gaining seven electrons. The ion has a charge of 1+.

- Again if the electronic configuration was 2.8.7 then it is quicker to gain electrons rather than losing seven electrons. The ion has a charge of 1-.