Thallium
Автор:
Jesse Russell,Ronald Cohn, издатель:
"VSD", ISBN:
978-5-5106-7710-2
High Quality Content by WIKIPEDIA articles! Thallium ( /???li?m/ thal-ee-?m) is a chemical element with the symbol Tl and atomic number 81. This soft gray poor metal resembles tin but discolors when exposed to air. The two chemists William Crookes and Clau