Group 7 - The Halogens

Question 1

How many electrons in the outer shell of halogens

Answer 1

Halogens have 7 electrons in the outer shell

Question 2

Does the reactivity of halogens increase or decrease going down the group

Answer 2

The reactivity of the halogens decrease going down because as the shells increase and the outer electron is further away from the nucleus there are less attractive force from the nucleus and then it’s harder to gain an electron

Question 3

So melting and boiling points increase or decrease going down the group

Answer 3

The boiling and melting points increase going down

Question 4

What charge ion do the halogens have

Answer 4

Halogens form -1 ions because they gain an electron to get a full outer shell and electrons have a negative charge and they gain 1 negative charge