Successive (IE) values of three elements of third period are given below

Elements (IE₁) (IE₂)
(in KJmol^–1) (IE₃)

X 513 4562 6920

Y 738 1451 7733

Z 1521 2666 3931

Atomic numbers of X, Y and Z respectively are

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

11, 12, 18

11, 12, 13

11, 12, 19

11, 12, 1

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

In the element "X" sudden jump in IP₂is observed . Thus element "X" is a first group element
IP₃ of element "Y" is abnormally high. Thus "Y" is a second group element
X,Y,Z belong to third period.
IP of Z is very high compared to that of X and Y. Moreover no abnormal jump in its IP₂ and IP₃ values.
Z must be a noble gas.
from inspection the atomic number of X,Y,Z are 11,12,18.

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th