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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
- State whether the following statement is true or false : The symbol...
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- Define 'molecular mass' of a substance.
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- What is meant by saying that 'the molecular mass of oxygen is 32'...
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- Fill in the following blanks with suitable words : (a) In water , t...
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- (a) Name the element used as a standard for atomic mass scale. (b) W...
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- Give one major drawback to Dalton's atomic theory of matter.
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- Dalton's atomic theory says that atoms are indivisible. Is this stat...
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- Is it possible to see atoms these days? Explain your answer.
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- 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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