Question

Elements X, Y and Z have atomic numbers 19,37 and 55 respectively. Which of the following
statements is true about them?
A
Their ionization potential would increase with increasing atomic number
'Y' would have an ionization potential between those of X and Z.
C
Z would have the highest ionization potential
D
Y would have the highest ionization potential​

Answer 1

Answer:

X, Y and Z belong to same group. While going down the group ionization potential decreases. Thus, IP of Y is between those of X and Z.