Topics 3,4,5 - Acids, Metals & Fuels: Metal Ores Flashcards
1
Q
What is meant by the terms oxidation and reduction?
A
Oxidation is a gain of oxygen. Reduction is a loss of oxygen.
2
Q
Why are some metals found in the Earth as the uncombined elements?
A
These elements are unreactive, so they don’t form compounds with other metals.
3
Q
What happens when a metal ore is heated with carbon?
A
If the metal is below carbon in the reactivity series, it’s reduced by the carbon. Metals above carbon in the reactivity series won’t react, so nothing will happen to the ore.
