Question

6.) please answer and explain thoroughly.

Arrange the following atoms in order of increasing size:

a.) Te, S, Se

b.) K, Br, Ni

c.) Ba, Si, F

Answer 1

In periodic table atomic size increases as we move from top to bottom in a group

Atom size of atoms decreases as we move from left to rigt in table

Based on these

a) S < Se < Te                    ( these three belongs to same group)

b) Br < Ni < K                 ( these belongs to same period with K at leftmost)

c) F < Si < Ba