1 Group 1 + 7 Flashcards
What are the elements in Group 1 called?
Alkali Metals
Why are the alkali metals called the alkali metals?
Because they form metal hydroxide solutions (alkali) when they react with water.
How do Group 1 elements react with water?
Vigorously
Group 1 metals react with oxygen to form…
Metal oxides.
Lithium + oxygen =
Lithium oxide.
Sodium + oxygen =
Sodium oxide/peroxide
Potassium + oxygen =
Potassium peroxide/superoxide
What are the group 1 trends?
More reactive going down.
Why are group 1 elements more reactive going down?
Lose electrons easier because electrons are further away from nucleus so less attraction so easier to lose.
What are the elements in Group 7 called?
Halogens = 7 letters group 7
What is Chlorine?
Poisonous green gas.
Describe Bromine.
Poisonous red/brown liquid.
Gives off orange vapour at room temp.
Describe Iodine.
Dark grey crystalline solid.
Purple Vapour when heated.
What are the physical trends in group 7?
Darker, more solid.
Reactivity increase up group
Why does reactivity increase going up group 7?
Because short distance between electrons and nucleus so easier to attract new electrons.
