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प्रश्न
Elements are the______ form of pure substances.
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उत्तर
Elements are the simplest form of pure substances.
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संबंधित प्रश्न
Write true or false
A heterogeneous mixture has a uniform composition throughout the mixture
Name the substance you will add to speed up sedimentation.
Give reason: Argon is filled in electric bulbs.
Indicate whether the following statement is true or false:
A compound is made up of just one kind of atom
Tick (√) the correct alternative from the choice given for the following statement
A non-metal which is a good conductor of electricity.
Tick (√) the correct alternative from the choice given for the following statement
A gaseous non-metal.
Draw a labelled diagram of an atom including its nucleus, orbits & their contents.
Write the names of elements from the following symbol:
Xe
Match the following.
| 1. | Element | Made up of molecules |
| 2. | Compound | Impure substance |
| 3. | Colloid | Settles down on standing |
| 4. | Suspension | Pure substance |
| 5. | Mixture | Made up of atoms |
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.
Name a non-metal other than carbon that shows allotropy.
