group 7 Flashcards
what are elements in group 7 known as
Halogens
how do halogens exist
the exist is diatomic molecules that are covalently bonded
What is the pattern as you go down group 7
Boiling points increase
describe how chlorine is at room temperature
it’s a yellow green gas
what do bromine look like at room temperature
a poisonous red brown liquids which gives off an orange vapour
what does iodine look like in room temperature
a dock grey solid which gives off purple vapor when heated
what is the test for chlorine
chlorine bleaches damp blue litmus paper turning it white (if it’s a dick it will turn red first)
why does reactivity decrease going down group 7
- only needs one electron so have a stable electronic structure
- as you go down the road it gets harder to track the electron because the shows are further away from the nucleus
who is the order of halogen reactivity
- Fluorine
- Chlorine
- Bromine
- Iodine
what do halogens react with metals to form
metal halides