Classification Of Elements And Periodicity In Properties Question 247
Question: What will be the order of Ist ionisation energy [BHU 2005]
Options:
A) Li > Na > K
B) K > Li > Na
C) Na > Li > K
D) Li > K > Na
Show Answer
Answer:
Correct Answer: A
Solution:
In a group, the ionisation potential decreases from top to bottom. In the alkali group, the ionisation potential decreases from Li to Cs. Li Na K Rb Cs eV 5.3 5.1 4.3 4.2 3.9
BETA
