Lesson 3 - Group 7 Flashcards
(11 cards)
What does the term ‘halogen’ mean?
Salt former. They are important elements because they from compounds with salts.
In compounds, halogens are used in swimming pools to kill _________.
Bacteria
What is bromine?
Bromine is a liquid at room temperature that evaporates into a brown-orange gas.
What is the electronic configuration for chlorine? Use periodic table.
2,8,7
What are some properties of Halogen?
They are poor electrical conductors and brittle when solid.
While going down the elements in Group 7, what happens to the density, melting and boiling points?
The density, melting and boiling points increase.
Which group of the periodic table do Halogens react vigorously to?
With group 1 metals
True or false, the reactivity decreases down the group, which is the opposite to alkali metals
True
Do halogens displace a more reactive halogen?
No, they displace a less reactive halogen
What is the toxic symbol on chemical bottles?
A skull with bones on each side
What is the harmful symbol on chemical bottles?
A cross (X)
