Periodicity

Question 1

Define the first ionisation energy

Answer 1

The first ionisation energy is the energy required to remove one electron from each atom in one mole of gaseous atoms of an element to form one mole of gaseous +1 ions

Question 2

What are the three factors which impact the ionisation energy?

Answer 2

Atomic radius- the larger the distance between the nucleus and the outer electrons, the less attraction between them
Nuclear charge- the more protons there are in the nucleus the stronger the attraction between the nucleus and the outer electrons
Electron shielding- electron repulsion reduces the attraction between the nucleus and the outer electrons