c4.1 predicting chemical reactions

Question 1

what is group 1 usually called

Answer 1

alkali metals

Question 2

what do group 1 form with water

Answer 2

alkali solutions

alkali metal + water => metal hydroxide + hydrogen

Question 3

going down group 1

Answer 3

• density increases
• melting point decreases
• reactivity increases

Question 4

what is group 7 called

Answer 4

the halogens

Question 5

what are the physical properties of group 7

Answer 5

non-metals
brittle
poor conductors
they exist as diatomic molecules with weak IMF.

Question 6

what is fluorine at RT

Answer 6

pale yellow gas

Question 7

what is chlorine at RT

Answer 7

green gas

Question 8

what is bromine at RT

Answer 8

an orange brown liquid

Question 9

what is iodine at RT

Answer 9

shiny grey- black crystalline solid

Question 10

going down group 7

Answer 10

density increases
melting and boiling points increase
reactivity decreases going down the group

Question 11

halogen displacement reactions

Answer 11

a halogen can only displace a halide if it is more reactive that the halide. 
So:
Chlorine can displace Bromide and Iodide
Bromine can displace Iodide
Iodide can't displace anything

Question 12

what is group 8 called

Answer 12

the noble gases

Question 13

trends in group 8

Answer 13

they are monatomic (exist as single atoms)

very weak IMF between them

Question 14

going down group 8…

Answer 14

• IMF get stronger between the atoms
• boiling points increase
• density increases

Question 15

typical properties of transition metals

Answer 15

shiny when cut
good conductors of electricity
strong
malleable

Question 16

compared to the alkali metals, the transition metals are..

Answer 16

• stronger and harder
• have higher densities
• have higher melting points
• also produce colourful ionic compounds
• can form more than 1 type of ion
• less reactive

Question 17

metal displacement reactions

Answer 17

more reactive metals can displace less reactive metals

Question 18

covalent bonds occur between

Answer 18

non-metals only

Question 19

ionic bonds occur between

Answer 19

metals and non-metals

Question 20

metals is groups 1 and 2 are…

Answer 20

more reactive than transition metals
and
become more reactive down the group