We have that for the Question "The number of electrons in an ion with 20 protons and an ionic charge of 2- is" it can be said that
From the question we are told
The number of electrons in an ion with 20 protons and an ionic charge of 2- is
Where
- Np=20
- an ionic charge of 2-
Generally the equation for the number of electrons is mathematically given as
[tex]Ne = Np - (+ve) + (-ve)\\\\Therefore\\\\N_e=20-2\\\\[/tex]
N_e=18
Therefore
number of electrons is
N_e=18
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