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In which direction does electric current flow ?
From anode to cathode
How to find which element is most reactive ?
Periodic table —> higher EN = more reactivity
Is an oxidized reaction an anode or cathde?
Anode
Is reduction an anode or cathode?
cathode
how to know when the mass decreases?
If electron flow (e-) is coming from that source.

Ex. ^^ electrons are coming from Zn, so the mass is decreasing because particles are being lost. Sn is gaining mass because electrons are being transferred