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प्रश्न
Explain the term ‘symbol’.
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उत्तर
Symbol is a short form or abbreviated name of the element.
OR
“Symbol of an element is the ‘first letter’ or the ‘first letter and another letter’ of the English name or Latin name of the element”.
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संबंधित प्रश्न
Write the molecular formulae for the following compounds and name the elements present of Common salt.
Write the molecular formulae of Lead (II) oxide – PbO.
Write the molecular formulae of Hydrogen sulphate (sulphuric acid).
Explain the term ‘variable valency’.
Copper having electronic configuration 2,8,18,1 exhibits variable valency. Give a reason for the same and name the compound CuCI and CuCl2.
With reference to water and ammonia as compounds respectively, state the valency of oxygen and nitrogen.
Write the chemical formula of the following compound in a step-by-step manner –
Sodium bromide
Write the chemical formula of the following compound in a step-by-step manner –
Copper [I] sulphide
Complete the statement given below by filling in the blank with the correct word.
The formula of silver [I] chloride is ________.
Complete the statement given below by filling in the blanks with the correct words.
The valency of iron in FeO is _______ of chlorine [chloride] in CaCl2 is ________ and of dichromate in K2 Cr2 O7 is ________.
