Science Says… …How Olympians Have Changed. http:// www.cbc.ca/sochi2014/sciencesays/video/the-science-of-stretching-and-warming-up. Learning goals:. By the end of class, I will be able to: Write the formula AND name the chemical formula for ionic compounds
What do we know about ionic compounds???
Step 1: Write the symbols of each element (remember to write the symbol for the metal first)
Step 2: Write the ion charge above each corresponding symbol. Remember that the ion charge is based on the number of electrons gained (negative) OR lost (positive) to become an ion.
Step 3: Crisscross the ion charges, erase the signs of each ion charge, and write them as subscripts
Note: If you need the same number of each ion, you can reduce the formula to one of each ion, as shown here.
Eg: Copper 1+ is named copper (I)
Copper 2+ is named copper (II)
Eg: Copper (II) chloride 2+ 1- Copper (II) chlorine CuCl2
Cobalt (II) Oxide