Question
Chemistry Question on trends in periodic table
The correct order in which the first ionisation potential increases is
A
Na, K, Be
B
K, Na, Be
C
K, Be, Na
D
Be, Na, K
Answer
K, Na, Be
Explanation
Solution
The first ionisation potential generally increases in a period from left to right and decreases in a group from up to down. Thus, the correct order of first ionisation potential is K<Na<Be