3.1.4: Evidence for electron shells

Question 1

what is ionisation?

Answer 1

occurs when an atom gains or looses an electron

Question 2

what is the first ionisation energy?

Answer 2

it is a measure of how easily an atom looses an electron to form a 1+ ion

Question 3

what 3 factors effect ionisation energy?

Answer 3

atomic radius
nuclear charge
electron sheilding

Question 4

how does atomic radius effect ionisation energy?

Answer 4

the larger the atomic radius the smaller the nuclear attraction of the outer electrons

Question 5

how does nuclear charge effect ionisation energy?

Answer 5

the higher the nuclear charge, the larger the attractive force on the outer electrons

Question 6

how does electron shielding effect ionisation energy?

Answer 6

inner shells of electrons repel the outer shell electrons due to being negative, this repelling effect is electron shielding
The more inner shells the more electron shielding and the weaker the nuclear attraction