20 common elements with symbol and uses

Quiz yourself by guessing what should be in each of the black rectangles below before clicking on it to display the answer.
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Element Name
Element Symbol
Atomic Number
Element Uses
Hydrogen   H   1   blimps, fertilizer, rocket fuel  
Helium   He   2   balloons, blimps, scuba divers  
Carbon   C   6   pencils, coal, diamonds  
Nitrogen   N   7   78% of air, liquid coolant  
Oxygen   O   8   cells need it, fire, steel  
Sodium   Na   11   street lights, batteries, soda  
Aluminum   Al   13   doorknobs, foil, cable  
Silicon   Si   14   solar cells, tools, microchips  
Sulfur   S   16   matches, fireworks, batteries  
Chlorine   Cl   17   water purification, bleach, hydrochloric acid  
Potassium   K   19   fertilizer  
Calcium   Ca   20   batteries, plaster of Paris  
Iron   Fe   26   bikes, cars, nails  
Nickel   Ni   28   coins, silverware, white gold  
Copper   Cu   29   cable, wire, water pipes  
Zinc   Zn   30   gutters, batteries  
Silver   Ag   47   mirrors, batteries, silverware  
Tin   Sn   50   coins, organ pipes, enamel  
Mercury   Hg   80   barometers, thermostats, street lights  
Gold   Au   79   jewelry, dental crowns  


   

 
 

 
 

 
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