Question

(a) In this crossword puzzle (Fig 3.2), names of 11 elements are hidden. Symbols of these are given below. Complete the puzzle.

1. CI 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 crossword puzzle.

Answer 1

(a) The names of these elements are given as follows:
1. Cl - Chlorine 7. He - Helium
2. H - Hydrogen 8. F - Fluorine
3. Ar - Argon 9. Kr - Krypton
4. O - Oxygen 10. Rn - Radon
5. Xe - Xenon 11. Ne - Neon
6. N - Nitrogen

(b) Total number of inert gases in this crossword puzzle is 6. Their names and symbols are as follows
$\begin{array}{ccc}S.No& Nameofgas& Symbol\\ 1.& Helium& He\\ 2.& Neon& Ne\\ 3.& Argon& Ar\\ 4.& Krypton& Kr\\ 5.& Xenon& Xe\\ 6.& Radon& Rn\end{array}$