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explain what is meant by electric current in metals
the movement of electrons
explain the structure of a metal
most electrons are fixed to their atoms + some electrons are free to move
metallic structure → lattice of positive ions surrounded by delocalised electrons
explain what is meant by electric current in electrolytes
the movement of ions
describe the structure an electrolyte
describe the decomposition of an electrolyte
molten or aqueous ionic solutions
separates into positive and negative ions → attracted to the cathode and anode
explain what is meant by conventional current
the representation of electric current as travelling from the positive to the negative terminal
describe the relation between electric current in metals and conventional current
travels from the negative to the positive terminal
opposite to the direction of conventional current
describe the relation between electric current in electrolytes and conventional current
can travel from the negative to the positive or from the positive to the negative terminal
either in the same direction or in the opposite direction of conventional current