Metals

Question 1

Can metals conduct heat

Answer 1

Yes, all metals conduct heat as their electrons are delocalised

Question 2

What is an alloy

Answer 2

When metals are mixed with other metals(or carbon ) to change their properties.

Question 3

Examples of alloys

Answer 3

Steel – iron & carbon (increase strength)
Stainless steel – iron, chromium & nickel (resists rusting)
Solder – lead & tin (melts at low temperature)

Question 4

Name metals from most reactive to least reactive

Answer 4

Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium 
Zinc
Iron
Tin 
Copper
Mercury 
Silver
Gold

Question 5

Equation: metal reacting with oxygen

Answer 5

Metal +oxygen—> metal oxide

Question 6

What metals react with oxygen?

Answer 6

All metals but mercury,silver and gold

Question 7

What metals react with acids?

Answer 7

All metals above copper

Question 8

Equation:metal reacting with acid

Answer 8

Metal+acid—>salt + hydrogen

Question 9

Equation:metal reacting with water

Answer 9

Metal + water —> metal hydroxide + hydrogen

Question 10

What metals react with water?

Answer 10

Potassium, sodium, lithium, calcium and magnesium

Question 11

Three different ways to seperate metals from their ores?

Answer 11

Electrolysis (using electricity
Heat and carbon
Heat alone

Question 12

What metals get extracted from heat alone?

Answer 12

Gold
Silver
Mercury

Question 13

What metals get extracted using heat and carbon?

Answer 13

Copper
Lead
Tin
Iron
Zinc

Question 14

What metals get extracted using electrolysis?

Answer 14

Potassium
sodium
lithium
Calcium
Magnesium
Aluminium

Question 15

Electrons in a electrochemical series always…

Answer 15

Electrons ALWAYS flow from a metal HIGHER in the series to a metal LOWER

Question 16

The further apart metals are in the series….

Answer 16

The higher voltage produced

Question 17

From where to where does the flow of charged particles go

Answer 17

Through the wire from mg to cu

Question 18

What happenes when ion concentration in the electrolyte is high?

Answer 18

Higher voltage is produced

Question 19

What is used to join to half cells?

Answer 19

An ion bridge, ions move across the bridge.

Question 20

What is a cell?

Answer 20

A battery

Question 21

What happens when pairs of metals are connected together with an electrolyte?

Answer 21

an electric current will flow.

Question 22

What is a electrolyte?

Answer 22

• ionic solution which completes the circuit

- Ions in the electrolyte which flow through the solution between the metals

Question 23

What is oxidation?

Answer 23

Loss of electrons

Question 24

What is reduction?

Answer 24

Gain of electrons

Question 25

Example of reduction

Answer 25

Copper ions - Metal ions turn into atoms by GAINING electrons - Copper is being REDUCED.

Question 26

Example of oxidation?

Answer 26

Zinc atoms - Metal atoms turn into ions by LOSING electrons - Zinc is being OXIDISED

Question 27

What is redox?

Answer 27

When oxidation and reduction happen at the same time?

Question 28

What is electrolysis?

Answer 28

breaking up of an ionic compound using electricity