The Halogens And The Noble Gases Flashcards
What happens to the halogens as you go up group 7?
They reactivity increases
What are halogens?
The name of the elements in group 7 of the periodic table
What are noble gases?
The name for the unreactive elements in group 0 of the periodic table
What are the properties and the use of chlorine?
Pale yellow/green gas
Poisonous
Used to kill bacteria in swimming pools
What are the properties and uses of iodine?
Shiny-grey solid or purple gas
Poisenous
Used to kill bacteria in wound dressings
What are the properties and uses for helium, neon and argon?
Colourless gases
Unreactive
Helium is used in balloons
All three are used in the manufacture of fluorescent tubes
Why is flouride added to water?
Prevents tooth decay. However, people object to the fluoridation of water
