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प्रश्न
Explain the terms 'valency' and 'variable valency'.
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उत्तर
Valency: The number of electrons that an atom can lose, gain or share during a chemical reaction is called its valency.
Variable valency: Certain elements exhibit more than one valency, i.e. they show variable valency.
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संबंधित प्रश्न
Give the names and symbols of five familiar substances which you think are elements.
Give the symbol of the following element:
Sulphur [sulphide]
Give the symbol of the following element:
Antimony
State the type of element for the following:
Bromine
Write the radical of the following valency:
Bromine [Bromide]
Write the chemical formula of the following:
magnesium oxide
Give the formula of the following acid:
Nitric
Give the formula of the following acid:
Sulphuric
Give the formula of the following gas:
Nitric oxide
Write the constituent elements and their symbols for the following compounds.
- Carbon monoxide
- Washing soda
