Metals Flashcards
What are delocalised electrons?
outer electrons which are held loosely and jump from atom to atom.
what is a metallic bond
A metallic bond is the attraction between the negative delocalised electrons and positive core (ion).
What do delocalised electrons allow metals to do?
-conduct electricity
-allows the atoms to stay together (metallic bond).
why can metals conduct electricity ?
they have delocalised electrons.
what are the products when a metal reacts with oxygen?
a metal oxide.
what are the products when a metal reacts with water?
metal hydroxide + hydrogen gas.
what are the products when a metal reacts with an acid
salt + hydrogen (not a neutralisation reaction as no water is produced)
how do you extract different elements of the electrochemical series from their ores?
lithium to aluminium = electrolysis
zinc to copper = reduction - heating with carbon
silver to gold = heat alone
do the reactivity series
Potassium
Sodium
Lithium
Calcium
Magnesium
Aluminium
Zing
Iron
Tin
Lead
Copper
Mercury
Silver
Gold
Platinum
Police Sargent Little Charlie (M.A.Z.I.T) Last Caught Me Stealing Gold Plates.
describe the reactivity of the elements of the reactivity series with water, acid and oxygen.
Potassium to silver = reacts with oxygen
Potassium to lead = reacts with (dilute?) acid
potassium to calcium = reacts with water
elements above hydrogen react with dilute acid
what is an ore?
Most metals are found in earths crust combined with other elements in rocks as ores. Natural metal compounds.
what is electrolysis
electrolysis is the splitting up of ionic compounds using electricity
what is the energy transformation in a battery
chemical energy to electrical energy
what is an electrolyte?
Ionic compound or solution in liquid - can conduct electricity
what affect does the size of the gap of the elements on the electrochemical series have on the voltage?
the bigger the gap the higher the voltage produced
