Term 2

Question 1

what is definition of 1st ionisation energy

Answer 1

the measure of how much energy it takes to form 1 mole of 1+ ions from 1 mole of the substance

Question 2

what 3 things does ionisation energy depend on

Answer 2

-atomic radius
-nuclear charge
-electron shielding

Question 3

what happens 1st ionisation energies as u go down a group

Answer 3

-atoms become larger
-atoms have one additional shell at the next quantum level
-additional shells are further away from nucleus so less attraction by nuclear charge
-electrons in outermost shells are shielded by the inner shell electron
-increased nuclear charge is offset by the above