successive ionisation energies of boron Flashcards
1
Q
why is there a big jump between 3rd and 4th ionisation energy
A
4th electron is removed from 1st shell whilst 3rd electron is removed from the 2nd shell
4th electron is closer to the nucleus with less shielding so there is a stronger electrostatic force of attraction
2
Q
why is there a stronger electrostatic force of attraction between successive ionisation energies
A
the electron is removed from an increasingly positive ion so there is a stronger electrostatic force of attraction
3
Q
why do ionisation energies increase across period 3
A
shielding stays constant
atomic radius stays constant
nuclear charge increases
effective nuclear charge increases
the electrostatic pull by the nucleus on the outer shell increases
so ionisation energies increase
