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What is the valency of calcium in CaCO(3...

What is the valency of calcium in `CaCO_(3)?`

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The valency of Ca in `CaCO_(3) is 2+(i.e, Ca^(2+))`
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DINESH PUBLICATION-ATOMS AND MOLECULES-VERY SHORT ANSWER QUESTIONS
  1. Calculate the molar mass of ethyl alcohol (C(2)H(5)OH).

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  2. If 16 g of oxygen contains 1 mole of oxygen atoms, calculate the ma...

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  3. What is the valency of calcium in CaCO(3)?

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  4. What happens to an element A if its atom gains two electrons?

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  5. Why is a cation so named?

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  6. An element Z forms an oxide with formula Z,O3. What is its valency?

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  7. The valency of an element A is 4. Write the formula of its oxide.

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  8. An element X has valency 3 while the element Y has valency 2. Write th...

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  9. Formula of the carbonate of a metal M is M(2)CO(3). Write the fomula o...

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  10. What do you understand from the statement "relative atomic mass of sul...

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  11. Calculate the formula unit mass of CaCl(2).

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  12. Which of the following represents the correct chemical formula? (i) ...

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  13. Sample A contains one gram molecules of oxygen molecules and sample B ...

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  14. Gram molecular mass of ammonia (NH(3)) is 17 g Is it correct to regard...

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  15. Give one example each of polyatomic element and polyatomic ion

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  16. Name the element which is used as a reterence for the atomic masses of...

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  17. Four samples of water [H(2)O] are collected from different sources, Ea...

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  18. Identify the cations and anions in the following compounds: (a)CH(3)...

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  19. Classify the following based on atomicity (a) O(3) (b)P(4) (c )Sg.

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  20. Which of the following symbols of elements are incorrect? Write correc...

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