Thalium or Thallium: How To spell?

The word Thalium is misspelled against Thallium, a noun meaning "A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7."

Thallium has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings tha & ium which should not be misspelled with single 'L'
Wrong Spelling:  tha-l-ium 
Correct Spelling:  tha-ll-ium 
Check more misspelled words of Thallium to spell it correct.