C4

Question 1

alkali metal physical properties

Answer 1

• low melting points
• low density
• very soft

Question 2

alkali metal reactivity

Answer 2

more reactive as you go down the group
easily lose their single outer electron to form an ion
outer electron becomes further away from the nucleus (less strongly attracted)

Question 3

alkali metals reacting with water

Answer 3

react vigorously
produces hydrogen gas
reactivity increases down the group, each time having a more violent reaction

Question 4

group 7 halogens

Answer 4

exist as diatomic molecules
covalent bond
melting point + boiling point increases down the group

Question 5

at room temp chlorine is a

Answer 5

green gas

Question 6

at room temp bromine is a

Answer 6

red brown liquid
gives off an orange vapour

Question 7

iodine is a … at room temp

Answer 7

dark grey cristalline solid which gives off a purple vapour

Question 8

reactivity halogens

Answer 8

decreases down the group

Question 9

halogens react with what to form a salt

Answer 9

alkali metals

Question 10

halogens undergo…. reactions

Answer 10

displacement

Question 11

what is a displacement reaction

Answer 11

more reactive element pushes out (displaces) a less reactive element

Question 12

what will be products in a reaction of chlorine and potassium bromide

Answer 12

bromine and potassium chloride

Question 13

noble gases group 0

Answer 13

colourless gases
monatomic
inert
non flammable

Question 14

noble gases bp? mp?

Answer 14

boiling point, melting point, density all increases as you go down the group

Question 15

transition metal properties

Answer 15

hard
strong
shiny
conduct heat
electricity
malleable
ductile
sonorous
much less reactive

Question 16

reactivity series

Answer 16

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