Group 7 Flashcards
1
Q
Why does reactivity decrease as the group goes down?
A
As you go down, there are more shells between the proton and reacting electron
Shielding theory - this lessens the attraction so less reactive with more shells
2
Q
How many electrons do halogens have in outer shell?
A
7
3
Q
Group 7 molecules
A
2 of the same element’s atoms react together to form a covalent bond between them
4
Q
Melting and boiling points as you move down the group?
A
They increase
They require more energy to change state
