Which of the following are most likely to form a stable ionic bond

a
Carbon (Period IVA) and Oxygen (Period VIA)
b
Lithium (Period IA) and Fluorine (Period VIIA)
c
Magnesium (Period IIA) and Iron (Period VIIIB)
d
Potassium (Period IA) and Tin (Period IVA)

1 answer

b
Lithium (Period IA) and Fluorine (Period VIIA)