a) In this crossword puzzle (Figure), names of 11 elements are hidden. Symbols of these are given below. Complete the puzzle.
1. Cl,
2) H
3) Ar,
4) O,
5) Xe, 6) N, 7) He, 8) F, 9) Kr, 10) Rn, 11) Ne

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

Explanation

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

b) Total number of inert gases in this crossword puzzle is 6.
Their names and symbols are as follows.