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प्रश्न
Write the differences between elements and compounds and give an example for each.
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उत्तर
| S.No. | Elements | Compounds |
| 1. | Contains only one kind of atom. | Contains more than one kind of atom. |
| 2. | It is a pure substance. | It is not a pure substance. |
| 3. | Elements cannot be broken down further into simpler substances by chemical methods. | Compounds can be broken down further into simpler substances by chemical methods. |
| 4. | Elements have definite physical and chemical properties. | Compounds have definite physical and chemical properties. |
| 5. | Examples of elements: oxygen O2, hydrogen H2, sodium Na. | Examples of compounds are water H2O, cane sugar C12H22O11. |
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संबंधित प्रश्न
What do you understand by :
Metalloids
State four difference between compounds and mixtures.
Why is it named so?
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Filtration
On what principle are the following methods of separation based? Give one example of a mixture for each of the methods mentioned in which they are used
Sedimentation and decantation
Fill in the blank
_______ are made up of same kind of atoms.
Fill in the blank:
_________ is a process to obtain a very pure form of a solid dissolved in a liquid.
Fill in the blank
A pure substance has definite _______ and constant _________.
Fill in the blank
Use of a __________ to separate the components of a mixture of solids is based on the difference in the size of the components.
Write true or false
All pure substances have characteristic melting and boiling points.
