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Give the formulae of the compounds forme...

Give the formulae of the compounds formed from the following sets of elements.
a) Calcium and fluroine
b) Hydrogen and sulphur
c) Nitrogen and hydrogen
d) Carbon and chlorine
e) Sodium and oxygen
f) Carbon and oxygen

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The correct Answer is:
(a) `CaF_(2)` , (b) ` H_(2)S` , (c ) `NH_(3)`, (d) `"CCl"_(4)` , (e ) `Na_(2)O` , (f) ` CO_(2)`
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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
  1. Name the following compounds. Also write the symbols/formulae of the ...

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  2. Write the cations and anions present (if any) in the following compoun...

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  3. Give the formulae of the compounds formed from the following sets of e...

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  4. What are ionic and molecular compounds? Give exmples.

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

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

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

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

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

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

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

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

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  13. The anion of an element has :

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

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

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

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  17. The cation of an element has :

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

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

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

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