JAMB - Chemistry (2020 - No. 3)
Duralumin consists of aluminum, copper?
Zinc and Gold
Lead and Manganese
Nickel and Silver
Manganese and Magnesium
คำอธิบาย
Duralumin is an alloy made up of 90% aluminum, 4% copper, 0.51% magnesium, and less than 1% manganese.