Metals Test

What is Oxidation?

Gain of oxygen, loss of electrons

What is reduction?

Gain of electrons, loss of oxygen

What is an alloy?

A metal mixed with another element (Metals or non-metals)

Why are metals so hard to melt?

Strong electrostatic forces and metallic bonds require lots of energy to break

Why are alloys stronger than pure metals?

Different atom shapes mean layers can’t slide over each other

What does the reactivity of a metal depend on?

It’s ability to lose electrons and form a positive ion

How is carbon used to extract metals from compounds?

Carbon can remove oxygen from metals and gain oxygen itself to displace the metal from the compound

Why can’t solid ionic compounds conduct electricity while molten and aqueous ones can?

In solids, the ions are locked in place while in molten and aqueous they are free to move

What is electrolysis?

a process where two electrodes are used to separate positive and negative ions to make ionic compounds pure

What are the properties of transition metals?

Hard, strong, high density, low reactivity, they form coloured compounds, used as catalysts

What is corrosion?

The natural deterioration of metals by chemical reactions when exposed to oxygen

What does rusting require to happen

exposure to water and air (not one or the other)