Groups 1&7 Flashcards
what is the name for the elements in group 1
alkali metals
describe how lithium, sodium and potassium all react when put in water
vigorously
what does the reaction of an alkali metal and water produce
metal hydroxide + hydrogen
as you go down group 1, what happens to the reactivity of the metals
they get more reactive
how many electrons do group 1 metals have in their outer shell
1
why are metals in group 1 more reactive towards the bottom of the group
as you go down the group, the atoms get bigger, the outer electron is more easily lost meaning the metals are more reactive
what is the name given to the element in group 7
halogens
as you go up group 7, what is the trend in reactivity
reactivity increases as you go up the group
explain a displacement reaction
when the more reactive element ‘pushes out’ the less reactive one
what is the loss of electrons known as
oxidation
what is the gain of electrons known as
reduction
what does an oxidising agent do
accepts electrons and gets reduced
what does a reducing agent do
donates electrons and gets oxidised
what is the reaction called when reduction and oxidation occur at the same time
redox reaction
