A mole

Below is my understanding of the mole:

1.  It's a unit of measurement for chemical substances.  It's symbol is mol
2.  Mole is actually derived from the German word "molekul", which means molecule.
3.  The weight of one mole of any chemical listed on the periodic table is equal to its atomic mass.  
4.  One mole = 6.02214179×1023

I also discovered the following piece of interesting information:
October 23 is called "Mole Day".  An informal holiday in honor of the unit among North American chemists.  Date is derived from Avogadro's number and it officially starts at 6:02 AM and ends at 6:02 PM.