question_answer 61)

  What information do you get from the figure about the atomic number, mass number and valency of atoms X, Y and Z? Give your answer in a tabular form.

Answer:

                  The tabular form is as below

Element	Atomic number (= no. of p)	Mass number = {no. of (p+n)}	Number of electrons (= no. of p)	Electronic configuration	Valency
X	5	5+6 =11	5	2,3	3
Y	8	8+10=18	8	2,6	2
Z	15	15+16=31	15	2,8,5	3,5