Mag64

Magnesium is a chemical element with the symbolMg and atomic number12. It is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. This element is produced in large, aging stars from the sequential addition of three helium nuclei to a carbon nucleus. When such star... [wikipedia]