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Write the names and symbols of the const...

Write the names and symbols of the constituent elements and identify their valencies from their molecular formula given below:
KCl, HBr, `MgBr_2, K_2O, NaH, CaCl_2, CCl_4, HI, H_2S, Na_2S, FeS, BaCl_2`

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NAVNEET PUBLICATION-COMPOSITION OF MATTER-QUESTION BANK
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  2. Give two examples of : Element with valency 2.

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  3. Write the names and symbols of the constituent elements and identify t...

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  4. What is meant by molecular formula ?

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  5. What is meant by valency of elements?

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  8. Deduce the molecular formulae of the compound obtained from the follow...

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  17. Give scientific reasons: Hydrogen is an element.

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  18. Give scientific reasons: Water is a compound

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