Periodic table - Crossword 2

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) P   2) H
4) Xe   3) Cr
6) K   5) Es
9) Na   7) As
10) Hg   8) F
11) N    
12) U    
13) Ra    
 OK 
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