Is there any difference between LED chips and LED beads?
The answer is yes. LED chips is a semi-finished goods of LED beads, it can't be mounted on a PCB (Printed Circuit Board).
LED chip is the actual effective thing performs glowing. It was packed by resin, leading out 2 electrodes, cathode and anode. The electrode was usually made of gold wires and copper pin (in generally it is copper). It glows at once charging with power.
Most often that we see on the market is LED beads, we can touch it, but LED chips are wrapped by a kind of material called resin, it can't be see or touch directly in common use.