Question

What is the requirement for writing molecular formulae of different compounds? How are the molecular formulae of the compounds written.

CONTENT REQUIRED
NO SPAMS!!

Answer 1

requirement of writing it is we wont be writing the full name but just a short form of it.
molecular formula
magnesium oxide = MgO

Answer 2

Hey mate,here's your answer.
To write molecular formulae of different compounds we should know their symbols as well as their valencys.Then we can write molecular formulae.
HOPE IT HELPS.