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Is it possible to see atoms these day...

Is it possible to see atoms these days? Explain your answer.

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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
  1. Give one major drawback to Dalton's atomic theory of matter.

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  2. Dalton's atomic theory says that atoms are indivisible. Is this stat...

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  3. Is it possible to see atoms these days? Explain your answer.

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  4. What is meant by the symbol of an element ? Explain with example...

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  5. (a) Give two symbols which have been derived from the "English names ...

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  6. Give the names and symbols of five familiar substances which you thin...

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  7. State the chemical symbols for the following element: Sodium, Potass...

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  8. Name the element represented by the following symbols : Hg, Pb, Au, ...

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  9. What is meant by atomicity ? Explain with two examples.

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  10. What is the atomicity of the following ? (a) Oxygen , (b) Ozone , (...

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  11. What is meant by a chemical formula ? Write the folrmulae of one elem...

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  12. Write the formulae of the following compounds. Also name the element ...

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  13. Explain the difference between 2 N and N(2).

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  14. What do the following abbreviations stand for ? (i) O , (ii) 2O ,...

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  15. What do the symbols, H(2), S and O(4) mean in the formula H(2)SO(...

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  16. (a) In water from does oxygen gas occur in nature ? (b) In what fo...

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  17. What is the difference between 2H and H(2) ?

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  18. What do the following denote ? (i) N, (ii) 2N, (iii) N(2) , (iv) 2...

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  19. What is the significance of the formula of a substance ?

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  20. What is the significance of the formula H(2)O ?

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