Theodore Gray's Elements Vault: Treasures of the Periodic Table with Removable Archival Documents and Real Element Samples - Including Pure Gold!The exploration of the elements continues! Theodore Gray's Elements Vault builds on Gray's best selling book with all new text, plus removable historic letters and other artifacts and collectible samples of real elements The Elements Vault picks up where The Elements left off. Organized into the nine major groups of the periodic table, including the alkali metals, the alkali earth metals, the transition metals, the nonmetals, the metalloids, the