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प्रश्न
Define: Compounds
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उत्तर
Compounds : A compound is a pure substance formed by the chemical combination of two or more elements in a fixed ratio by mass.
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संबंधित प्रश्न
What is the significance of the symbol of an element ? Explain with the help of an example.
How are the elements with variable valency named? Explain with an example.
Give two examples of the following:
Solid + Liquid mixture
Give a reason why elements are tabulated in a table called the ‘Periodic table’.
Give the symbol of the following element:
Zinc
Give the symbol of the following element:
Platinum
Write the radical of the following valency:
Sulphur [Sulphide]
Write the chemical formula of the following:
zinc oxide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Oxide
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
