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Name the element water is made of. What ...

Name the element water is made of. What are the valencies of the element ? Work out the chemical formula of water.

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The correct Answer is:
Water is made up of Hydrogen and Oxygen
H has 1 as valency and Oxygen has 2 valency
`H_(2)O`
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LAKHMIR SINGH & MANJIT KAUR-ATOMS AND MOLECULES-Exercise
  1. Name the particle which has 18 electrons , 18 neutrons and 17 protons...

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  2. Fill in the following blanks with suitable words : (a) The particl...

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  3. Name the element water is made of. What are the valencies of the eleme...

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  4. If the valency of hydrogen is 1 and that of nitrogen is 3, work out t...

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  5. Work out the formula for sulphur dioxide. (Valencies : S = 4 , O = ...

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  6. If the valency of carbon is 4 and that of sulphur is 2, work out the...

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  7. An element X has a valency of 4 whereas another element Y has a valen...

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  8. An element B show valencies of 4 and 6. Write the formulae of its two...

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  9. An element X of valency 3 conbines with another element Y of valenc...

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  10. Work out the formula for magnesium hydrogencarbonate.

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  11. An element X has a valency of 2. Write the simplest formula for : ...

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  12. Work out the formulae for the following compounds : (a) Sodium oxide...

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  13. Calculate the formula masses of following compounds : (i) Sodi...

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  14. Name the following compounds. Also write the symbols/formulae of the ...

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

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

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

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

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

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

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