For 10 points, identity this alkaline earth metal with atomic number 12 and chemical symbol Mg.
This element is oxidized in the titanium-producing Kroll process. Reagents containing this element participate in reactions which transform nitriles into ketones and aldehydes or ketones into alcohols; these are (*) Grignard reagents. It can be used to remove sulfur from steel, and when used in benchtop reactions, this element is usually in the form of a ribbon. When this element is burned, a bright white flare is produced. Located in the porphyrin ring of chlorophyll, this element has a hydroxide whose aqueous solution is commonly known as a "milk," as well as a sulfate known as Epsom salt. For 10 points, identity this alkaline earth metal with atomic number 12 and chemical symbol Mg.
This element is oxidized in the titanium-producing Kroll process.
magnesium (accept Mg before mention)