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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
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.
Hydrogen by ‘H’
Give the symbol of the following element:
Sulphur [sulphide]
Give the symbol of the following element:
Xenon
State the type of element for the following:
Boron
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).
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).
Bicarbonate
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).
Sulphate
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
The name copper was taken from ______.
Write a note on Greem symbols.
