ionisation energy

Question 1

what is IE

Answer 1

the minimum amount of energy required to remove one mole of electrons from one mole of gaseous atoms to form one mole of gaseous ions

Question 1

What are the factors affecting IE

Answer 1

Shielding
- more shielding = decrease in IE
Nuclear charge
- more nuclear charge = increase in IE
Distance (from nucleus)
- more distance = decrease in IE

Question 2

What are the trends down a group

Answer 2

• energy level increases by 1 so shielding, nuclear charge and distance increase but shielding and distance increase significantly more than nuclear charge so IE decreases

Question 3

What are the trends across a period?

Answer 3

shielding stays the same, nuclear charge increases by 1 but distance mostly stays the same so IE increases