First ionisation energy Flashcards
1
Q
What is first ionisation energy?
A
The energy requires to remove 1 mol of electrons from 1 mol of an atom in its gaseous state
2
Q
What is the trend across a period with the first ionisation energy?
A
The first ionisation energy increases as the nuclear charge increases
3
Q
What happens between groups 2 and 3?
A
The first ionisation energy dips because of the higher energy p-electron
4
Q
What happens between groups 5 and 6?
A
The first ionisation energy dips because of the spin pair repulsion
