C3H4A1L1C3O1G2E1N1
17 points
CHALCOGEN is validvalid
a chemical element in the sixteenth group of the periodic table [n CHALCOGENS]
an element from group VI(B) of the periodic table, namely sulphur, selenium or tellurium [n -S]
a chemical element in the sixteenth group of the periodic table [n CHALCOGENS]
an element from group VI(B) of the periodic table, namely sulphur, selenium or tellurium [n -S]