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प्रश्न
Write the radical of the following valency:
Sulphur [Sulphide]
विकल्प
1+
2+
3+
1−
2−
3−
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उत्तर
2−
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संबंधित प्रश्न
Define: Compounds
Give two examples of the following :
Solid + Solid mixture
Give two symbols which have been derived from the "English names" of the elements.
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’
Match the symbols of metallic elements – with their correct combining power or capacity.
(a) K
(b) Zn
(c) Al
(d) Na
(e) Ca
Combining power or capacity – A : 3 ; B : 2 ; C : 1. (positive valencies)
Write the formula of the compound formed – given symbols and combining power or capacity (valency) of the following element in the compound.
K1+ Cl1-
Give the symbol of the following element:
Oxygen
State a reason why the symbol of calcium is ‘Ca’ and of copper is ‘Cu’
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).
Bromide
What does a chemical symbol represent?
