The CPI takes a constant basket of goods and sees how the price changes from year to year. If the price of the basket of goods increases, then there is price inflation. If the price of the basket of goods decreases, then there is deflation.
Copper and tin mainly make up bronze but other elements include phosphorus, manganese, silicon and aluminium.
Confidence votes 2.6K. Bronze is a alloy of copper and tin, but it may also contain phosphorus, manganese, silicon and aluminium. Bronze use was most prominant in the bronze age, where as the name suggests it was used to create nearly all the tools, weapons and luxury items that humans needed at the time.