This helps to visualise the structure. A two-dimensional model for the ionic lattice in sodium chloride A 2D model shows the arrangement of one layer of ions but it does have a major additional ...

Sodium will lose an electron and form a positive ... For example Magnesium (Mg) has the electron arrangement 2,8,2. To become stable it must lose its two outer electrons to obtain a full outer ...

2nd Period: Lithium to neon—Electrons go into the second level. After the second level has 8 electrons, the next electron goes into the third level. 3rd Period: Sodium to argon—Electrons go into the ...