1. Give the names of the following elements:

         C __________________________________________

         Cl _________________________________________

         Na _________________________________________

         Ca _________________________________________

         Fe _________________________________________         

         U __________________________________________

         Hg _________________________________________

         S __________________________________________

         Cd _________________________________________

         Cu _________________________________________

         Cd _________________________________________

         Ba _________________________________________

2. Give the symbols for the following elements:

         Neon ________________

         Phosphorus ___________

         Potassium ____________

         Zinc _________________

         Magnesium ___________

         Lead ________________

         Gold ________________

         Bromine _____________

         Iodine _______________

         Arsenic ______________

         Manganese ___________

         Silver _______________