Question

(a) What is an octet? How do elements reach an octet? 

(b) Make a schematic atomic structure of magnesium and phosphorus. 

[Given number of protons of magnesium = 12 and that of phosphorus = 15] 

Answer 1

(a) Octet is an arrangement of 8 electrons in outermost shell to achieve nearest noble gas electronic configuration. Elements complete their octet by sharing, gaining or donating electrons to become stable