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(a) In this crossword puzzle , names of 11 elements are hidden. Symbols of these are given below. Complete the puzzle. 

1.      Cl      7. He 

2.      H      8. F 

3.      Ar      9. Kr 

4.      O      10. Rn 

5.      Xe     11. Ne 

6. N

(b) Identify the total number of inert gases, their names and symbols from this cross word puzzle.

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1 Answer

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by (128k points)


(b) Six : Helium (He); Neon ( Ne); Argon (Ar); Krypton (Kr); Xenon (Xe); Radon (Rn).

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