Rules to write chemical formulas?

Question

Answer

There is no specific rule for this .. just u have to exchange the valancy..  of different element

Answer

Rules for writing a chemical formula

Write down the symbols of the elements / ions, which combine to form a molecule of the compound, side by side. ...

Write the valency of each element / ion.

Interchange the valencies of the elements / ions and write as the subscript. ...

The radical / polyatomic ions must be written in brackets, before the subscript is written.

Answer

Rules to Write Chemical Formulas:

1. Write the Symbols of the Elements:
- Begin by writing the symbols of the elements that are involved in the compound. Each element is represented by a unique symbol such as H for hydrogen, O for oxygen, and Na for sodium.

2. Determine the Charge of Each Element:
- Some elements have fixed charges, while others can have variable charges. It is important to determine the charge of each element before writing the chemical formula.

3. Use Subscripts to Indicate the Number of Atoms:
- Use subscripts to indicate the number of atoms of each element in the compound. For example, H2O represents one molecule of water, which consists of two hydrogen atoms and one oxygen atom.

4. Simplify the Ratio of Atoms:
- Simplify the ratio of atoms in the compound by dividing the subscripts by the greatest common factor. For example, the formula for hydrogen peroxide is H2O2, which can be simplified to HO.

5. Use Parentheses for Polyatomic Ions:
- If the compound contains a polyatomic ion, such as sulfate (SO4) or carbonate (CO3), use parentheses to indicate the entire ion. For example, calcium carbonate is written as CaCO3.

6. Check for Accuracy:
- Always double-check your chemical formula for accuracy. Make sure that the charges balance out and that the subscripts correctly represent the ratio of atoms in the compound.
Following these rules will help you accurately write chemical formulas for various compounds.

Similar Class 9 Doubts

Write chemical formulas of 20 compounds ?

How to write the chemical formula for methane .ch4?

Write the step to deduce the chemical formula of magnesium oxide?

Write chemical formulas of the following-: 1. Barium sulphate 2. Ammonium nitrate 3. limestone.?

Which law should we remember to write chemical equation?

Top Courses for Class 9View all

Science Class 9

Social Studies (SST) Class 9

Mathematics (Maths) Class 9

English Class 9

English Grammar Advanced

Top Courses for Class 9

Top Courses for Class 9

Suggested Free Tests

Related Content

Class 9 Study Material

Class 9 Subjects

Competitive Examinations for Class 9

NCERT Books

NCERT Solutions

Reference Books for Class 9

Other Popular Exams

Company