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प्रश्न
What do you understand by chemical formula of a compound? What is its significance?
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उत्तर
- A chemical formula is a symbolic representation of one molecule of an element or a compound.
- It provides information about the elements present in the molecule and the number of atoms of each element. The chemical formula tells us the types of atoms and the number of each type of atom in one molecule of substance.
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संबंधित प्रश्न
The element having atomicity 'four' is most likely to be :
Write down the formulae for the following compounds :
Magnesium hydroxide
Name the element in the compound and give the formula of the following compound:
Carbonic acid
Name the element in the compound and give the formula of the following compound:
Glauber’s salt
Write the formula of the following compound:
Sodium plumbite
Write the formula of the following compound:
Sodium iodide
Write the formula of the following compound:
Magnesium chloride
Write the formula of the following compound:
Silver [II] chloride
State of the following formula of a compound is incorrect. Incorrectly write the correct formula.
NaZnO2
Play a game for writing formula.
Example 2: A low-cost model for writing formulae: Take empty blister packs of medicines. Cut them in groups according to the valency of the element, as shown in the figure. Now, you can make formulae by fixing one type of ion into other.
For example:
The formula for sodium sulphate:
2 sodium ions can be fixed on one sulphate ion.
Hence, the formula will be Na2SO4.
Do it yourself:
Now, write the formula of sodium phosphate.
