C4 - The group 7 elements Flashcards
1
Q
What is chlorine used for?
A
Chlorine is used for bleaching and sterilizing water.
2
Q
What are the states of chlorine, bromine and iodine at room temperature?
A
Chlorine: gas
Bromine: liquid
Iodine: solid
3
Q
What happens when alkali metals react with a halogen?
A
A vigorous reaction occurs which produces a metal halide.
4
Q
What is the word equation for the reaction between potassium and chlorine?
A
potassium + chlorine = potassium chloride
5
Q
What is the word equation for chlorine and sodium iodide?
A
chlorine + sodium iodide = sodium chloride + iodine
6
Q
What is the trend in reactivity for group 7 elements?
A
As you go down the group the elements become less reactive.
