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Name the element represented by the foll...

Name the element represented by the following symbols :
`Hg, Pb, Au, Ag, Sn`

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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
  1. Give the names and symbols of five familiar substances which you thin...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  16. The molecular formula of glucose is C(6)H(12)O(6). Calculate its molec...

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  17. Calculate the molecular masses of the following : (a) Hydrogen, H(2)...

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  18. Calculate the molecular masses of the following compounds : (a) Met...

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  19. Calculate the molecular masses of the following compounds : (a) Me...

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  20. Calculate the molecular mass of ethanoic acid, CH(3)COOH. (Atomic ma...

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