metals Flashcards
free electrons that are able to move across the metal structure
delocalised electrons
when a positive metal nuclei attract delocalised electrons
metallic bond (very strong)
do metals have high or low melting points
they have vert high melting and boiling points
why are metals good conductors
the delocalised electrons move easily through the metal
what is malleability
when the metal can be shaped or bent easily
what is an alloy
a mixture of two or more metals
what is an advatage of an alloy
they have improved properties than regular metals have such as bronze brass and steel
metal + acid —>
salt + hydrogen
what reaction releases heat
exothermic
a metal + acid is what kind of reaction
redox
in a metal + acid reaction is the metal reduced or oxidised
oxidised
hydrogen ions get reduced to what
hydrogen gas
any metal below (a) will not react with (a)
hydrogen
metal + oxygen—->
metal oxide
what metal reacts with air the fastest
potassium
what is effervescence
fizzing
as you (descend or ascend) group 1 the metals become more reactive
descend
the most unreactive metal is …
gold
what happens during a displacemnt reaction
the more reactive metal will displace the less reactive metal from a solution of metal ions
what indicates a displacemt reaction has occurred
a colour change
what does oil stand for
oxidation
is
loss
what does rig stand for
reduction
is
gain
oxidation is
loss of electrons
reduction is
gain of electrons
page 10 in the data book show
reduction reactions
in reduction reaction the electrons will appear on the
left of the arrow
in oxidation reactions the elctrons will appear on the
right of the equation
do redox equations contain electrons
no
potassium
sodium
lithium
calcium
react with what
water
magnesium aluminium zinc iron tin lead
react with what
acid
copper
mercury
silver
react with what
oxygen
in electrosis the metals always get
reduced
in a molten or aqueous solution the the ions are
free to move
why is a dc current used in electrosis
it flows in one direction ( so the ions and atoms are only drawn to one either positive or negative carbon rod)
