1 The national average price of gas in December was $2.51 per gallon, which was the lowest monthly average since May 2009. 2  The average in December 2013 was $3.26 per gallon. 3  Consumers this month spent about $215 million per day less on gasoline compared to December 2013. The annual average price of gasoline in 2014 was $3.34 per gallon, which was about 15 cents less than last yearâs annual average of $3.49 per gallon.
A sulfide formed with tin and antimony is called franckeite. Lead is found in the mineral nagyagite, a sulfide, along with gold, iron, antimony, and tellurium. Silver joins with lead and antimony in the sulfide andorite, AgPbSb3S6. Lead, copper and iron join in the sulfide betekhtinite. In the sulfide mineral hutchinsonite,(Tl, Pb)2As5S9 , lead joins with arsenic and thallium.
Lead: historical information. Lead was discovered by known since ancient times in unknown at not known. Origin of name: from the Anglo-Saxon word lead; Latin, plumbum (the origin of the symbol Pb is the Latin word plumbum meaning liquid silver. Lead has been known for ages and is mentioned in Exodus. Alchemists believed lead to be the oldest metal and associated it with the planet Saturn. They spent a lot of time trying to transmute lead into gold.