Periodic table - Crossword 1

Complete the crossword, then click on "Check" to check your answer. Click on a number in the grid to see the clue or clues for that number. If you are stuck, you can click on "Hint" to get a free letter.
 
 Check 
 Check 
Across   Down
1) Mg   2) Si
3) Ca   4) Zn
6) Ni   5) Ag
7) Fe   9) O
8) C   11) Au
10) Ne    
12) Cu    
13) Pb    
 OK 
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