unit 3 - Metals

Question 1

why do metals conduct?

Answer 1

an electric current can flow through a metal due to delocalised electrons which are free to move

Question 2

give the product(s) of a metal reacting with water

Answer 2

metal hydroxide + hyrdogen

Question 3

give the product(s) of a metal reacting with acid

Answer 3

a salt + hydrogen

Question 4

give the products(s) of a metal reacting with oxygen

Answer 4

metal oxide

Question 5

which elements can react with water

Answer 5

first 4

Question 6

which elements react with acid

Answer 6

first block

Question 7

which elements react with oxygen

Answer 7

up to silver

Question 8

what are ores

Answer 8

naturally occurring rock which contain metal or metal compounds

Question 9

when a metal is extracted from its ore, what happens to the metal ion

Answer 9

is reduced

Question 10

which metals must be extracted by electrolysis

Answer 10

first 6

Question 11

explain the process of electrolysis

Answer 11

metal ore is melted and electrolysed with a direct current. positive metal ions are attracted to the negative electrode

Question 12

which metals can be extracted by heating with carbon?

Answer 12

zinc-copper (middle block - after first 6, bedore last block)

Question 13

what is carbon’s role in extracting metals from ores

Answer 13

acts as reducing agent - forces other elemt to be reduced

Question 14

which metals can be extracted by heat alone

Answer 14

last 3

Question 15

in a displacement reaction, the ______ metal displaces the _____ metal

Answer 15

more reactive (higher up) metal displaces the less reactive (lower down) metal