Mineral That's Number 12 on the Periodic Table

This page is the CodyCross answer for the clue below from Culinary School, Group 2212, Puzzle 1 (Training Staff).

Question is: Mineral That's Number 12 on the Periodic Table

and the answer is: MAGNESIUM

Word Meaning:

MAGNESIUM — The chemical element with an atomic number of 12. It is a light, easily flammable, silvery-white alkaline earth metal.

Definitions from Wiktionary.