Group 7 : The Halogens 💃💃

Question 1

As you go down group 7 the melting point…. ( and why )

Answer 1

Increases
Because the forces between larger molecules are stronger

Question 2

What is the most reactive element?

Answer 2

Fluorine

Question 3

Why are experiments with the halogens used in a fume cupboard?

Answer 3

Because the halogens are toxic

Question 4

The reactivity…

Answer 4

Decreases down the group, because outer electron is further away from the nucleus.

Question 5

What are the halogens? ( hint pairs )

Answer 5

Diatomic- they go around as two elements

Question 6

Properties of the halogens:

Answer 6

Low melting and boiling points which increases down the group.
Reactivity decreases down the group
Poor conductors of heat and electricity

Question 7

Reactions of the halogens:

Answer 7

React with metals to form ionic compounds called salts
eg// magnesium+ chlorine> magnesium chloride

Question 8

Why is fluorine very reactive?

Answer 8

Because it has less electron shells and is closer to the nucleus and it has less electron shielding