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(a) What is the difference between a c...

(a) What is the difference between a cation and an anion? Explain with examples.
(b) The valencies (or charges) of some of he ions are given below :

Using this information, write down the formula of :
(i) Sodium sulphide
(ii) Copper nitrate

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The correct Answer is:
(b) (i) `Na_(2)S` , (ii) ` Cu(NO_(3))_(2)`
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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
  1. What are ionic and molecular compounds? Give exmples.

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  2. (a) What is an ion ? How is an ion formed ? Explain with the help of t...

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  3. (a) What is the difference between a cation and an anion? Explain ...

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  4. Explain the formation of (i) sodium ion, and (ii) chloride ion, from ...

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  5. (a) Write the symbols/formulae of two simple ions and two compound io...

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  6. (a) Define 'formula unit' of an ionic compound. What is the formul...

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  7. The atomic number of an element X is 13. What will be the number of el...

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  8. Which of the following represents a correct chemical formula ?

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  9. If the number of electrons in an ion Z^(3-) is 10, the atomic number...

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  10. The anion of an element has :

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  11. A particle X has 17 protons, 18 neutrons and 18 electrons. This part...

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  12. An element which can exhibit valencies of 2, 4 and 6 can be :

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  13. The atomic number of an element E is 16. The number of electrons in i...

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  14. The cation of an element has :

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  15. Two elements X and Y have valencies of 5 and 3, and 3 and 2, respecti...

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  16. The number of electrons in an ion Y^(2+) is 10. The atomic number of e...

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  17. A particle P has 18 electrons, 20 neutrons and 19 protons. This parti...

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  18. An ionic compound will be formed by the combination of one of the foll...

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  19. Molecular compounds are usually formed by the combination between :

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  20. The formula of a compound is X(3)Y. The valencies of element X and Y ...

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