C4.1.2 Group 7 - The Halogens

Question 1

What are group 7 elements called

Answer 1

Halogens

Question 2

What charge do halogens have

Answer 2

-1

Question 3

As you go down

Answer 3

Melting points increase
Get more solid
Reactivity decreases

Question 4

Hey do halogens become less reactive as you go down

Answer 4

Atomic radiuses increase
The outer shell electrons and the nucleus are further away
So the attraction between them is weaker
And it is more difficult for the atom to pull an electron from the metal
Resulting in a weaker reaction

Question 5

How do halogens exist and why?

Answer 5

Diatomic molecules because they aren’t stable without a full electron shell
So they share one pair of electrons in a covalent bond giving both a full outer shell

Question 6

What happens when halogens react with alkali metals

Answer 6

Form metal halides or salts