Question

Composition of the nuclei of two atomic species X and Y are given below.
Х Y
protons 8 8
neutrons 8 10

a. Write the electronic configuration of the element Y
b. Is there any similarity between X and Y? How are they related to each other?​

Answer 1

(a) Mass number of X = no. of protons + no. of neutrons

                                = 8 + 8 = 16

Mass number of Y = 8 + 10 = 18

(b) Electronic configuration of X:

                              K          L

                              2          6

Since X and Y have same no. of protons so, their electronic configuration and valency will also be same hence they are isotopes.