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What are the builiding blocks of matter...

What are the builiding blocks of matter ?

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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
  1. If 100 grams of pure water taken from different sources is decomposed ...

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  2. If 100 grams of calcium carbonate (whether in the form of marble or ...

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  3. What are the builiding blocks of matter ?

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  4. How is the size of an atom indicated ?

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  5. Name the unit in which the radius of an atom is usually expressed.

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  6. Write the relation between nanometre and metre.

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  7. The radius of an oxygen atom is 0.073 nm. What does the symbol 'nm' ...

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  8. State whether the following statement is true or false : The symbol...

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  9. Define 'molecular mass' of a substance.

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  10. What is meant by saying that 'the molecular mass of oxygen is 32'...

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  11. Fill in the following blanks with suitable words : (a) In water , t...

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  12. (a) Name the element used as a standard for atomic mass scale. (b) W...

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  13. Give one major drawback to Dalton's atomic theory of matter.

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

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

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

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

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

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

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

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