Group 7 Elements Flashcards
1
Q
What are group 7 elements knows as
A
Halogens
2
Q
How do group 7 elements react
A
- reacts with metals to form ionic compounds in which the non metal has a -1 charge from gaining an electron
- a more reactive halogen can displace a less reactive halogen
Cl2 + 2KBr —> Br2 + 2KCl
(The halogens swap places)
3
Q
What type of molecules are group 7 elements
A
They are all diatomic molecules (exist as a pair, like Br2)
4
Q
What are trends in the group 7 elements
A
reactivity decreases as you go down the group:
- the outermost shell gets further away from the positive nucleus as you go down, this means the attractive force needed to pull in an electron weakens
- melting and boiling points increase as you go down
5
Q
What do you call a group 7 ion
A
Halide
(Chlorine, bromide etc)
