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An element has valency 3. Write the form...

An element has valency 3. Write the formula of its oxide.

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The valency of oxygen is 2 while that of element E is 3. The formula of the oxide of the element is: `E_(2)O_(3)`.
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DINESH PUBLICATION-ATOMS AND MOLECULES-VERY SHORT ANSWER QUESTIONS
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  2. Gram molecular mass of ammonia (NH(3)) is 17 g Is it correct to regard...

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

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

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

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

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

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

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  9. Give the example of trivalent cation and monovalent anion. Write the f...

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  10. Name the compound Al(2)(SO(4))(3), and mention the ions present in it.

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  11. Write the formulae and the names of the ions formed by the combination...

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  12. Name a non-metal which is tetratomic.

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  13. Name the cation and anion which constirute the molecule of magnesium o...

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  14. An element has valency 3. Write the formula of its oxide.

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  15. An element has valency 3. Write the formula of its oxide.

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  16. What do you understand by 1 amu?

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  17. What is meant by atomicity ? Explain with two examples.

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  18. Write the Latin names of sodium and iron.

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  19. What do you understand by the word mole?

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  20. What name is given to the number 6.022 xx 10^(23) ?

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