C3 Flashcards
what is metallic bonding
electrostatic attractions between positive and negative ions
what are delocalised electrons
are not bound to an atom and free to move around
what are pure metals
giant structure with strong electrostatic forces between metal ions
are metals good conductors of electricity
yes
what colour is a potassium flame
lilac
what does sodium do
fizzes rapidly and melts to form a ball that moves around the water surface
what does lithum do
fizzes steadily and floats
what metals react with dilute acids
magnesium aluminium zinc iron and lead
metals that dont react to dilute acid
copper silver gold and platinum
how to find a displacement order
a metal can only displace only if its higher in the reactivity series
whats an electrolyte
when ionic compounds are melted or dissolved in water
what are electrodes
when a voltage is applied across an electrolyte the charged ions are attracted to the electrode with the opposite charge
what is an element
when an ion touches an electrode elecrons can be transferred
what is electrolysis
used to extract metal from molten ores
