metals and plastics

Question 1

metal properties

Answer 1

shiny, grey (usually)
malleable (can be worked into shapes)
strong 
conduct electricity and heat
wide range of melting and boiling points

Question 2

metallic bonding definition

Answer 2

the electrostatic force of attraction between positively charged ions and delocalised electrons

Question 3

oxygen reaction with metals

Answer 3

metal + oxygen = metal oxide

Question 4

metal and water reaction

Answer 4

metal + water = metal hydroxide + hydrogen

Question 5

metal and acid reaction

Answer 5

metal + acid = salt + hydrogen

Question 6

metals naturally react with oxygen/water/acid forming…

Answer 6

metal ores

Question 7

metals are extracted from ores by:

Answer 7

heat alone
heat with carbon
electrolysis

Question 8

electrochemical series:

heat alone

Answer 8

silver to gold

Question 9

electrochemical series:

heat with carbon

Answer 9

zinc to copper

Question 10

electrochemical series:

electrolysis

Answer 10

lithium to aluminium

Question 11

describe electrolysis

Answer 11

during electrolysis, positive metal ions are attracted to the negative electrode and negative non-metal ions are attracted to the positive electrode

Question 12

reduction of lithium

Answer 12

Li+ + e- ~ Li

Question 13

oxidation of lithium

Answer 13

Li ~ Li+ + e-

Question 14

explain a simple cell

Answer 14

a simple cell can be made by placing two metals in an electrolyte

Question 15

electricity conducting solutions containing ions are known as…

Answer 15

electrolytes

Question 16

describe the voltage in electrochemical cells

Answer 16

the further apart elements are in the electrochemical series, the greater the voltage produced when they are used to make an electrochemical cell

Question 17

OIL RIG

Answer 17

oxidation is loss (of electrons)

reduction is gain (of electrons)

Question 18

half cells contain metals in solutions…

Answer 18

of their own ions

Question 19

what is an ion bridge

Answer 19

soaking electrolyte, links the 2 half cells together, ions can move across the bridge to complete the electrical circuit

Question 20

electrons flow from the species higher in the ECs…

Answer 20

to the species lower

Question 21

electricity can be produced in…

Answer 21

where at least one of the half cells does not involve metal atoms/ions

Question 22

what can be used as the electrode in such half cells

Answer 22

a graphite rod

Question 23

what are polymers

Answer 23

they are long chain molecules formed by joining together a large number of small molecules called

Question 24

addition polymerisation

Answer 24

small unsaturated monomer (e.g. alkenes) join to make one large polymer