metals & plastics 3.1, 3.2

Question 1

why do atoms bond

Answer 1

to become stable

Question 2

why can metals conduct electricity and heat

Answer 2

because the delocalised electrons are free to move

Question 3

metallic bonding

Answer 3

electrostatic attraction between metal ions and delocalised outer shell electrons

Question 4

metal + oxygen

Answer 4

metal oxide

Question 5

metal + acid

Answer 5

salt + hydrogen

Question 6

metal + water

Answer 6

metal hydroxide + hydrogen

Question 7

electrochemical cells

Answer 7

when electricity can be produced by connecting different metals together (with an electolyte to form a cell)

Question 8

oxidation

Answer 8

is loss of electrons

Question 9

reduction

Answer 9

is gain of electrons

Question 10

what is the function of the ion bridge

Answer 10

to complete the circut and to manage the flow of ions

Question 11

how can metals be extracted from ores

Answer 11

heat alone, heat with carbon and electrolysis

Question 12

how are platics made

Answer 12

from chemicals found in crude oil

Question 13

polymer

Answer 13

very large molecules made from small repeating units called monomers

Question 14

addition polymerisation

Answer 14

small unsaturated monomers (alkenes) join to make one large polymer