Metals And Reactivitiy

Question 1

When an atom loses or gains electrons to form a full outer shell of electrons

Answer 1

An ion

Question 2

Chemical reaction

Answer 2

Reactants to a product

Question 3

Why do the alkali metals reactivity increases going down the group

Answer 3

The atoms of each element get larger going down the group
Outer shell electron gets further away from the nucleus
The further the electrons is from positive nucleus the easier it’s lost in reactions
That’s why the reactivity if alkaline metals increases going down group 1

Question 4

Two traits you see as you go down the alkali metals

Answer 4

Metals become softer
Reacts with air to form oxides

Question 5

Sodium reaction with water

Answer 5

Fizzes more than lithium
The sodium melts into a metallic spherical ball bearing
The hydrogen sometimes catches fire

Question 6

Lithium reaction with water

Answer 6

Least reactive of alkaline metals
Added to water it fizzes and movies around slowly

Question 7

Potassium reaction with water

Answer 7

Moves around the water very quickly
Melts with heat reaction
Produces so much heat the hydrogen catches fire

Question 8

Exothermic reaction def

Answer 8

A reaction that releases heat

Question 9

Word equation for oxidation reaction between oxygen and alkali metal

Answer 9

Alkaline metal + oxygen ____. Alkali metal oxide

Question 10

Group number =

Answer 10

How many electrons are in the outer shell of the atom

Question 11

Lithium
Float
Energy change
Gas given off
Is there a flame
Change in colour of the indicator

Answer 11

Float
Yes
Yes
No
Purple

Question 12

Sodium
Float
Energy change
Gas given off
Is there a flame
Change in colour of the indicator

Answer 12

Float
Yes
Yes
No
Purple

Question 13

Potassium
Float
Energy change
Gas given off
Flame
Colour of indicator

Answer 13

Floats
Yes
Yes
Yes
Purple

Question 14

Displacement reactions

Answer 14

One metal is more reactive than the other metals it will displace it e.g
Iron +copper sulphate +++++ iron sulphate + copper
Iron displaces copper and takes the sulphate

Question 15

Metals can be ordered by reactivity the table is called

Answer 15

The reactivity series

Question 16

Displacement reaction will take place if

Answer 16

One metal displaces the other because it is more reactive which you can see in the reactivity series

Question 17

Reactivity series shows

Answer 17

Which metals are more reactive and so therefore tell us if a displacement will occur

Question 18

Reactivity displacement

Answer 18

Less reactive metal displaced by more reactive metal

Question 19

When Iron or steel rusts , it is actually being oxidised
The oxidising agent is

Answer 19

Oxygen is then the oxidising agent

Question 20

Reduction

Answer 20

Reduction is the removal of oxygen from a substance

Question 21

Whats a redox reactions

Answer 21

Where oxidation and reduction occur

Question 22

Galavansing

Answer 22

Adding a sacrificial layer of zinc to the substances

Question 23

Reduction

Answer 23

Loss of oxygen or gain of electrons

Question 24

Oxidation

Answer 24

Gain of oxygen or loss of electrons

Question 25

Redox

Answer 25

Where reduction and oxidation occurs in the same reaction