wifi chips

[curlyc]

are all the wifi chips i find in old junk re useable?

[aBUGSworstnightmare]

are all the wifi chips i find in old junk re useable?

Sure, use a railgun and use them for wall art.

Sorry, but such a question without any details will lead to non-useful answers

[k-pi]

Wifi chips require drivers & firmware - if you have that, likely they can be used.

[mahjongg]

if by "WiFi chips" you mean WiFi dongles, then see the answer above, if you mean any old WiFi chip soldered to an old printed circuit board, then the answer is probably not.