Q. 184.3( 4 Votes )

What rules are to be kept in mind while writing a chemical formula?

Answer :

The rules which are to be kept in mind while writing a chemical formula is:

i. The valencies or charges on the ion must balance.


ii. When a compound consists of a metal and a non-metal, the name or symbol of the metal is written first.


iii. For ex: calcium oxide (CaO), sodium chloride (NaCl) where oxygen and chlorine are written on the right whereas calcium and sodium are written on the left.


iv. If the valencies of two elements are same, we will simplify the formula.


v. In compounds formed with polyatomic ions, the ion is enclosed in a bracket before writing the number to indicate the ratio.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
NCERT Exemplar | Atoms and MoleculesNCERT Exemplar | Atoms and MoleculesNCERT Exemplar | Atoms and Molecules43 mins
NCERT Exemplar | Atoms and MoleculesNCERT Exemplar | Atoms and MoleculesNCERT Exemplar | Atoms and Molecules48 mins
Mastering in ValencyMastering in ValencyMastering in Valency33 mins
Atomic ModelsAtomic ModelsAtomic Models53 mins
NCERT | Laws of Chemical Combinations - INCERT | Laws of Chemical Combinations - INCERT | Laws of Chemical Combinations - I43 mins
Smart Revision | Basic Concept of MoleSmart Revision | Basic Concept of MoleSmart Revision | Basic Concept of Mole51 mins
Types of BondingTypes of BondingTypes of Bonding29 mins
Champ Quiz | Are you a Master of Mole Concept ?Champ Quiz | Are you a Master of Mole Concept ?Champ Quiz | Are you a Master of Mole Concept ?35 mins
Quiz on Be a Master of Mole Concept in 30 Minutes!Quiz on Be a Master of Mole Concept in 30 Minutes!Quiz on Be a Master of Mole Concept in 30 Minutes!35 mins
Why & How Elements Combine?Why & How Elements Combine?Why & How Elements Combine?46 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses