why can't lead displace hydrogen from dilute acids?

Hi,

In graphite each carbon atom is covalently bonded to three carbon atoms to give trigonal geometry. Three out of four valence electrons of each carbon atom are used in bond formation with three other carbon atoms while the fourth electron is free to move in the structure of graphite. Fourth electron of each carbon atom forms delocalized p-bonds, which spreads uniformly over all carbon atoms.

The basic trigonal units unite together to give basic hexagonal ring. These rings form flat layers, which are arranged in parallel, one above the other.

 

Hope it is clear to you now.

@ Rishita, Afzal

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