ionisation energy Flashcards
1
Q
first ionisation energy
A
the amount of energy required to remove 1 mole of electrons from 1 mole of atoms in a gaseous state
2
Q
down group
A
bigger down group so more shielding, easier to remove e so ie decreases
3
Q
across period
A
ie increases
- number of protons increases but similar shielding
4
Q
3 factors affecting ie
A
1) charge/number of protons in atom
2) distance from nucleus
3) shielding
5
Q
greater charge
A
higher ie
6
Q
further away outer e is from nucleus
A
easier it is to remove e since there’s less attraction so ie decreases when distance increases
7
Q
lots of shielding
A
reduces amount of energy required to remove outer e
- greater shielding = less energy so ie decreases
