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.

A= {1, 2, 3, 4, 5}, B= {4, 5, 6, 7, 8}, C= {7, 8, 9, 10, 11}, D= {10, 11, 12, 13, 14} . Find the following sets. A cup B

A= {1, 2, 3, 4, 5}, B= {4, 5, 6, 7, 8}, C= {7, 8, 9, 10, 11}, D= {10, 11, 12, 13, 14} . Find the following sets. A cap C

A= {1, 2, 3, 4, 5, 6}, B= {7, 8, 9, 10, 11}" and " C= {6, 8, 10, 12, 14} . Show that A and B are disjoint sets but A and C are not disjoint sets.

From the given list identify the diatomic molecules : Ne, Ar, O_(2), F_(2), Cl_(2), H_(2)O, P_(4), S_(8), O_(3)

In the matrix A=[(8, 9, 4, 3), (-1, sqrt(7), (sqrt(3))/(2), 5), (1, 4, 3, 0), (6, 8, -11, 1)] , write The number of elements.

Two dice, one blue and one grey, are thrown at the same time. Complete the following table: Event: Sum on two dice, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 Probability, , , , , , , , , , , From the above table a student argues that there are 11 possible outcomes 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 and 12. Therefore, each of them has a probability 1/(11) . Do you agree with this argument?

A= {1, 2, 3, 4, 5, 6}, B= {1, 2, 3, 7, 8, 10}, C= {1, 2, 5, 9, 10}, U= {1, 2,3, 4, 5, 6, 7, 8, 9, 10, 11} Show these sets in Venn diagram.

""_(5 )B ""_(6 ) C ,""_(7 ) N , ""_(8 ) O ,""_(9 ) F .""_(10 ) Ne are in a period in the periodic table . write the decreasing order of the atomic size of the given elements .