Tin, an element in the periodic table, can be spelled using abbreviations from the periodic table: (Ti)(N).
What other elements can you find with this property?
As listed in the previous post, there are 118 element names in all, of which 85 end in the letters -ium or -um. None of those 85 can be spelled using abbreviations from the periodic table, because there aren't any elements abbreviated M, Um, or Ium.
The remaining 33 elements are:
antimony, argon, arsenic, astatine, bismuth, boron, bromine, carbon, chlorine, cobalt, copper, fluorine, gold, hydrogen, iodine, iron, krypton, lead, manganese, mercury, neon, nickel, nitrogen, oxygen, phosphorus, radon, silicon, silver, sulfur, tin, tungsten, xenon, zinc.
Of these, 13 can be spelled using element abbreviations:
carbon, neon, silicon, phosphorus, iron, copper, arsenic, krypton, silver, tin, xenon, bismuth
By the way, the big story this year for periodic table junkies was the certification of elements with Z = 113, 115, 117, and 118 by the relevant IUPAC/IUPAP Joint Working Party. The process of giving those elements permanent names now begins.