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Which of the following symbols of elemen...

Which of the following symbols of elements are incorrect? Write correct symbols
(a) Iron (lr) (6) Gold (Au) () Manganese (M) (d) Potassium (Po) (e) Zinc (ZN) F Calcium (Ca)

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(a) Iron (Fe) (c) Manganese (Mn) (d) Potassium (K) (e) Zinc (Zn).
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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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