Electrons in oxidation and reduction

Electrons in oxidation and reduction

Multiple Choice

In oxidation, what is lost?

• mass

• sense of self worth

• electrons

• heat

Multiple Choice

what charge do metal ions form?

• positive

• negative

• neutral

Multiple Choice

VERY reactive metals are split from their ores using...

• force

• heating with carbon

• electrolysis

• filtering

Multiple Choice

which element is used to reduce iron?

• carbon

• oxygen

• more iron

• nitrogen

• an acid

Multiple Choice

how many electrons has iron lost to become Fe 2+

• 1

• 2

• 3

• 4

Multiple Choice

how many electrons did copper 2+ gain to become copper

• 1

• 2

• 3

• 4

Multiple Choice

if the copper gained electrons it has been...

• oxidised

• reduced

• melted

• acidified

Multiple Choice

if the iron lost electrons it has been...

• oxidised

• reduced

• melted

• acidified