Group 7 - The Halogens Flashcards
1
Q
How ,many non-metals are there in Group 7?
A
5
2
Q
What is chlorine at room temperature and pressure?
A
A green gas
3
Q
What is Bromine at room temperature and pressure?
A
A brown liquid
4
Q
What is iodine at room temperature and pressure?
A
A dark purple/grey solid
5
Q
What happens to iodine when it is heated?
A
It turns into a purple gas
6
Q
What do all Halogens consist of?
A
Diatomic molecules (they exist only in pairs of atoms)
7
Q
Give an example of this
A
eg. Cl(2), Br(2), I(2)
8
Q
What can halogens be used as?
A
Bleach dyes and to kill bacteris
9
Q
What happens to the physical properties of the halogens as you go down the group?
A
They alter
10
Q
What does it mean the further an element is down the group?
A
- The lower the reactivity
- The higher the melting and boiling points
- The higher the density
11
Q
What happens when halogens react with alkali metals?
A
They produce halides
