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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 two examples of the following :
Solid + Solid mixture
An atom of an element is denoted by a “symbol” Explain the meaning of the term ‘symbol’. State a reason for representing the following element by its symbol.
Copper by ‘Cu’
Give the symbol of the following element:
Copper
State the type of element for the following:
Carbon
State the type of element for the following:
Lead
Write the radical of the following valency:
Hydroxide
Write the chemical formula of the following:
magnesium sulphate
State the valency of the following metallic element and write symbol with the valency
Calcium
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Copper
write symbol with the variable valency
Which of the following would weigh the highest?
