Topic 1 Group 7 Elements

Question 1

What are group 7 known as

Answer 1

Halogens

Question 2

What are all halogens

Answer 2

Nonmetals with coloured vapours

Question 3

halogens

Answer 3

Fluorine
Chlorine
Bromine
Iodine

Question 4

What do halogens naturally exist in

Answer 4

Pairs of atoms

Question 5

Colours of the halogens

Answer 5

Florine = yellow gas (reactive abs poisonous)
Chlorine = dense green gas ( fairly reactive and poisonous)
Bromine = red brown volatile liquid (dense poisonous )
Iodine = dark grey crystalline solid or purple vapour

Question 6

Trends of the halogens

Answer 6

As you go down :
Less reactive - harder to gain electrons because the outer shell is further away from the nucleus
Higher mp and bp
Have higher relative atomic masses

Question 7

How do all halogens react

Answer 7

In similar ways because they all have 7 electrons on the out shell

Question 8

How do halogens form molecular compounds

Answer 8

Halogen atoms can share electrons via covalent bonds with other non metals to get a full outer shell

Question 9

What do all halogens form when reacting with another non metal

Answer 9

Simple molecular structures

Question 10

How do halogens form ionic bonds

Answer 10

When ionically bonded to metals

Question 11

What ions do halogens form

Answer 11

Halides
1- ions
E.g F- Cl- Br- I-

Question 12

What do more reactive halogens displace

Answer 12

Less reactive ones