Halogens & Noble Gasses - Topic 1 Flashcards
State 3 properties of group 7.
Non-metal,
highly reactive,
diatomic
Describe the appearance of fluorine, chlorine, bromine and iodine.
Fluorine = pale yellow gas
Chlorine = green gas
Bromine = orange brown liquid
Iodine = grey / black solid
What happens to reactivity as you move down group 7?
They become less reactive - it is harder to gain an electron.
Explain the trend in reactivity down group 7.
The halogens become less reactive as it becomes harder to gain an electron, as the outer shell is further away from the nucleus, resulting in a weaker force of attraction.
Write a word equation for the reaction of chlorine solution with sodium bromide.
Chlorine + sodium bromide → sodium chloride + bromine
What type of reaction takes place in the reaction of chlorine solution with sodium bromide.
Displacement.
Explain why noble gases are inert.
They have a full outer shell which means they don’t need to lose or gain electrons.
Do the noble gases react with each other to form molecules?
No, the noble gases are monoatomic.
What happens to boiling point of the noble gases as you go down the group?
Boiling point increase because the relative atomic mass increases.
