Name the first 20 elements of the Periodic Table

Crossword for naming the first 20 elements of the Periodic Table

  
Click on a number in the grid to see the clue or clues for that number.
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter.
1     2            3      
                 
     4              
                 
       5            
 6                  
7            8        9   
         10          
        11           
12     13                
         14          
      15             
             16      
17             18        
                 
  19                 
                 

Across:

1. S
4. P
5. Be
7. Mg
8. Si
11. Na
12. Li
14. O
15. Ne
17. Cl
18. C
19. He

Down:

2. F
3. Al
4. K
6. Ca
9. N
10. B
13. H
16. Ar