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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
- What is meant by the symbol of an element ? Explain with example...
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- (a) Give two symbols which have been derived from the "English names ...
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- Give the names and symbols of five familiar substances which you thin...
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- State the chemical symbols for the following element: Sodium, Potass...
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- Name the element represented by the following symbols : Hg, Pb, Au, ...
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- What is meant by atomicity ? Explain with two examples.
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- What is the atomicity of the following ? (a) Oxygen , (b) Ozone , (...
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- What is meant by a chemical formula ? Write the folrmulae of one elem...
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- Write the formulae of the following compounds. Also name the element ...
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- Explain the difference between 2 N and N(2).
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- What do the following abbreviations stand for ? (i) O , (ii) 2O ,...
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- What do the symbols, H(2), S and O(4) mean in the formula H(2)SO(...
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- (a) In water from does oxygen gas occur in nature ? (b) In what fo...
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- What is the difference between 2H and H(2) ?
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- What do the following denote ? (i) N, (ii) 2N, (iii) N(2) , (iv) 2...
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- What is the significance of the formula of a substance ?
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- What is the significance of the formula H(2)O ?
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- The molecular formula of glucose is C(6)H(12)O(6). Calculate its molec...
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- Calculate the molecular masses of the following : (a) Hydrogen, H(2)...
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- Calculate the molecular masses of the following compounds : (a) Met...
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