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 ...

THE specimens under observation in the electron microscope are exposed simultaneously to a high vacuum and to electron bombardment. Under these conditions, the specimens may lose volatile ...

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 ...