halogens Flashcards
1
Q
what are the trends in properties in halogens
A
- all diatomic
- colours get darker down group
- MP/BP increases down group
2
Q
state and colour of fluorine
A
very pale yellow
(g)
3
Q
state and colour of chlorine
A
pale green
(g)
4
Q
state and colour of bromine
A
brown
(l) - volatile
5
Q
state and colour of iodine
A
dark grey
(s) - sublimes
6
Q
state and colour of astatine
A
black
(s)
7
Q
what is reactivity like in halogens
A
less reactive down the group
8
Q
why does reactivity decrease down the group
A
- atoms have more electrons
- the extra electron is further from the nucleus
- so attraction to nucleus is weaker
