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प्रश्न
Define the term ‘valency’.
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उत्तर
Valency is the number of hydrogen atoms which combine with (or displace) one atom of the element forming a Compound.
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संबंधित प्रश्न
The formula of the sulphate of an element X is X2(SO4)3. The formula of nitride of element X will be :
Fill in the blank:
Symbolic expression for a molecule is called _____.
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.
Helium by ‘He’
State the type of element for the following:
potassium
State the type of element for the following:
Carbon
State the type of element for the following:
Arsenic
Write the radical of the following valency:
Oxygen
Give the formula of the following gas:
Hydrogen chloride
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).
Iodide
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).
Sulphite
