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An element X of group 15 and period 2 ex...

An element X of group 15 and period 2 exists as diatomic molecule. It combines with hydrogen and forms ammonia in the presence of a suitable catalyst.
Draw the electron dot structure of ammonia.

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`H xx * underset(H)underset(xx *)overset(* *)N * xx H`
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ICSE-PERIODIC PROPERTIES OF ELEMENTS -QUESTIONS FOR PRACTICE ON EXAMINATION PATTERN (SECTION II)
  1. An element X of group 15 and period 2 exists as diatomic molecule. It ...

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  2. An element X of group 15 and period 2 exists as diatomic molecule. It ...

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  3. An element X of group 15 and period 2 exists as diatomic molecule. It ...

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  4. What is the total number of covalent bonds in a molecule of ammonia?

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  5. In group 1 of the periodic table three elements X, Y and Z have atomic...

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  6. From each of the following sets, name the element with characteristics...

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  7. From the electronic configurations Li (2, 1), Na (2, 8, 1) and K (2, 8...

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  8. From the electronic configurations Li (2, 1), Na (2, 8, 1) and K (2, 8...

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  9. From the electronic configurations Li (2, 1), Na (2, 8, 1) and K (2, 8...

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  10. From the electronic configurations Li (2, 1), Na (2, 8, 1) and K (2, 8...

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  11. From the electronic configurations Li (2, 1), Na (2, 8, 1) and K (2, 8...

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  12. State the following: How do the atomic radii change in a period with...

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  13. State the following: How does metallic character change in a period ...

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  14. From the electronic configurations N (2,5), O (2,6) and F (2,7), answe...

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  15. From the electronic configurations N (2,5), O (2,6) and F (2,7), answe...

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  16. From the electronic configurations N (2,5), O (2,6) and F (2,7), answe...

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  17. From the electronic configurations N (2,5), O (2,6) and F (2,7), answe...

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  18. From the electronic configurations N (2,5), O (2,6) and F (2,7), answe...

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  19. Atomic symbols of the first 20 elements of the periodic table are jumb...

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  20. Atomic symbols of the first 20 elements of the periodic table are jumb...

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