Topic 3 - REDOX

Question 1

What’s oxidation number ?

2

Answer 1

-number of electrons lost or gained by atom of that element in that compound
( gained = negative )

Question 2

What does an oxidant agent do ?

1

Answer 2

• get reduced : gains electrons

Question 3

What does a reducing agent do ?

1

Answer 3

• gets oxidised : loses electrons

Question 4

What’s a disproportionation reaction ?

1

Answer 4

• element is both oxidised and reduced

Question 5

What do metals form ?

1

Answer 5

• lose electrons = form positive ions

Question 6

What do non metals form ? (1)

Answer 6

• form negative ions by gain of electrons