Group 7 - Periodic Table Flashcards
1
Q
What are the group 7 elements called?
A
Halogens
2
Q
What molecules do halogens create, with how many atoms?
A
Form molecules that contain two atoms
3
Q
What pattern happens as you go down group 7?
A
Becomes less reactive
Have higher melting and boiling pints
Higher relative atomic masses
4
Q
What type of compound does halogens make?
A
Molecular compounds- covalent bonds
5
Q
What types of bonds do they form with metals?
A
Ionic
6
Q
How does a displacement reaction happen with halogens?
A
A reaction can take place between a halogen and the salt of a less reactive halogen.
E.g chlorine is more reactive than bromine’s so if you add chlorine to a solution containing bromide salt, bromine will be displaced - cl_2(g) + 2KBr(aq) -> Br_2(aq) + 2KCl (aq)
