group 1 and 7

Question 1

what happens when you go down group 1?

Answer 1

becomes more reactive

Question 2

how many electrons do group 1 elements have in their outer shell?

Answer 2

1

Question 3

give the name for group 1

Answer 3

alkali metals

Question 4

list 5 physical properties of group 1 metals

Answer 4

• soft
• very reactive
• fizz
• float
• low melting points

Question 5

which group 1 metal float on water?

Answer 5

lithium
sodium
potassium

Question 6

define a displacement reaction

Answer 6

a more reactive halogen will displace a less reactive halogen from a solution of its compound

Question 7

what is the name for group 7?

Answer 7

halogens

Question 8

what happens as you go down group 7?

Answer 8

become less reactive

Question 9

define a redox

Answer 9

oxidation and reduction occurring at the same time in a reaction

Question 10

define oxidation

Answer 10

when a substance gains oxygen or loses electrons

Question 11

define reduction

Answer 11

when a substance loses oxygen

Question 12

OIL RIG

Answer 12

• oxidation is loss (of e)
• reduction is gain (of e)

Question 13

what colour and state is bromine and what vapour does it give off at room temperature?

Answer 13

• red-brown liquid
• orange vapour at room temperature

Question 13

what colour and state is iodine and what vapour does it give off when heated?

Answer 13

• dark grey crystalline solid
• purple vapour when heated

Question 14

colour of chlorine water in potassium bromide solution

Answer 14

colourless to orange

Question 15

colour of bromine water in potassium iodide solution

Answer 15

orange to brown