Group 7 elements Flashcards
1
Q
What are the group 7 elements called?
A
- Halogens
2
Q
Properties of halogens:
A
- Toxic
- Low boiling point
- Low melting point
- Poor conductors of heat + electricity
- Exist in diatomic molecules
3
Q
How are halogens joined together?
A
- Covalent bonding
4
Q
How do the properties of Group 7 elements change going down the group?
A
- Becomes less reactive
- Higher boiling point
- Higher melting point
5
Q
How do Group 7 elements behave when reacting?
A
- Gain ion, form -1
- Full outer shell, stable
6
Q
How do halogens react with other elements to become stable?
A
- Share electrons with non-metals
- Covalent bonding
7
Q
How do halogens react with other elements to form an ion?
A
- Bond with metals
- Form -1 ion
8
Q
What is a displacement reaction in halogens?
A
- A more reactive halogen will displace a less reactive halogen from solutions of its salts
E.g: Cl2 + 2KBr –> 2KCl + Br2
(Chlorine displaces Bromine)
