Question

how the higher electron affinity favours ionic bonding?​

Answer 1

higher electron affinity indicates higher resistance to gain an electron it means the atom is not ready to gain an electron it is ready to loose electron

this loosing of electrons takes place only with the metals with 1,2or 3 Valence electrons

hence the higher electron affinity favours ionic bond which takes place between metal and nonmetal..

HOPE IT HELPS U BUDDY;)