Ionisation Energies Flashcards
1
Q
write the first IE of calcium
A
Ca (g) ——-> ca+ (g) + e-
2
Q
list the 4 factors affecting
A
- size of nuclear charge
- shielding/screening effect
- distance of electron from nucleus
- spin pair electron repulsion
3
Q
what does IE do across a period
A
ionisation energy generally increases across a period
4
Q
what does IE do down a group
A
ionisation energy generally decreases down the group
5
Q
what happens to FAIE across a period
A
- nuclear charge increases causing atomic radius to decrease as the outer shell is pulled closer to the nucleus so the distance between the nucleus and outer shell decrease
- shielding by inner electrons is constant as electrons are being added to the same shell
- more energy is required as it becomes harder to remove a shell
6
Q
what happens to IE when you change from one period to the next
A
- IE decreases greatly between the last element in the previous period and the first one in the next period :
- bc distance from the nucleus increases as another shell is being added
- there’s increased shielding effect bc of newly added shell
- there’s an increase in nuclear charge but its outweighed by the above 2