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प्रश्न
Define: Compounds
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उत्तर
Compounds are pure substances composed of two or more elements in definite proportion by mass and has properties, entirely different from those of its constituents elements.
Compound, are made up of different types of atoms combined chemically.
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संबंधित प्रश्न
Write true or false
All pure substances have characteristic melting and boiling points.
Name: an Inert Gas
Define: Molecule
What is meant by 2H and H2
Give reason: Graphite is used to make a lead of the pencils.
Write an answer to the following question in your own words.
Which elements (metals and non-metals), compounds and mixtures do we use in our day-to-day life?
Select the correct answer to the statement given below:
A compound containing carbon, oxygen and calcium.
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
Match the following:
| 1. | Co2 | a. | Robert Boyle |
| 2. | Sulfur | b. | Making mobile phones |
| 3. | Element | c. | triatomic molecule |
| 4. | Gallium | d. | Polyatomic molecule |
Higher-Order Thinking questions:
Why is hydrogen considered an element?
