(12) The halogens Flashcards
1
Q
How many electrons do all group 7 elements have in their outer shell?
A
Seven
2
Q
How do the halogens exist by themselves?
A
As diatomic molecules.
3
Q
What sort of bonding do the halogens have?
A
Covalent bonding.
4
Q
What group related features do halogens have?
A
- Their melting point increases down the group.
- They suck at conducting heat and electricity.
- Their reactivity decreases down the group.
5
Q
How do halogens react with hydrogen?
A
They react with it to form hydrogen halides. (For ex:-H2 + Br2 = 2Hbr)
6
Q
What are the features of hydrogen halides?
A
They are all poisonous, acidic gases that are covalently bonded. They are also very soluble in water.
