10.1- THE HALOGENS Flashcards
Is the group 7 elements metals or non-metals?
non-metals
What do the group 7 elements exist as?
diatomic molecules
What is the group 7 elements called?
halogens
What is the appearance of the gaseous halogens?
vary in appearance
At room temperature what colour and state is fluorine?
pale yellow gas
At room temperature what colour and state is chlorine?
greenish gas
At room temperature what colour and state is bromine?
red-brown liquid
At room temperatue what colour and state is iodine?
black solid
Going down group 7 how does the colour and density of the elements change?
get darker and denser going down group
What smell does all the halogens have?
“swimming-bath” smell
What is a number of the properties of fluorine described as?
untypical
Where does many of the untypical properties of fluorine stem from?
F-F bond unexpectedly weak, compared with trend for rest of halogens
What is the size of fluorine like?
small size
What does the small size of fluorine lead to?
repulsion between non-bonding electrons as they’re so close together
How does electronegativity change going down group 7?
decreases going down group 7