Indicate the electronic configuration of Mg +2 and F- ions and compare it with the structure of the neon atom.

1. Consider Mg0, its serial number is 12, which means it has 12 electrons, which are located:

1s22s22p63s2, when Mg0 – 2- → Mg + 2, that is, the total number of its electrons is 12 – 2 = 10 and their configuration: 1s22s22p6;

2. F0 has 9 electrons: 1s22s22p5, if F0 + 1- → F-, then the number of its electrons increases 9 + 1 = 10, and the electronic configuration looks like: 1s22s22p6;

3. the neon atom Ne0 has 10 electrons and the configuration: 1s22s22p6, that is, the particles Mg + 2 and F- have the electronic structure of the complete energy level.