question_answer 121)

    (a) In this ladder (Figure) symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic numbers in the periodic table. (b) Arrange them in the order of their group also.                

Answer:

                                    (a)The symbols of elements arranged in increasing order of their atomic numbers are as shown below   (b) The symbols of elements arranged in increasing order of their group numbers are as follows.  

1	2	13	14	15	16	17	18
H							He
Li	Be	B	C	N	O	F	Ne
Na	Mg	Al	Si	P	S	Cl	Ar
K	Ca