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The atomic number of an element 'Y' is 1...

The atomic number of an element 'Y' is 19, the formula of its oxide is……….

A

YO

B

`YO_2`

C

`Y_2O`

D

`Y_2O_3`

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BEYOND PUBLICATION-CHEMICAL BONDING-EXERCISE
  1. Which of the following molecules/ ions doesn't follow the octet rule ?

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  2. The atomic number of covalent element X is 12 the formula of its chlor...

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  3. The atomic number of an element 'Y' is 19, the formula of its oxide is...

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  4. The shape of the ammonia molecule is………

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  5. The bond angle is 120^@ among……….hybrid orbitals.

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  6. What is the crystal structure of NaCl ?

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  7. Ionic bond is formed between atoms of elements with electronegativity ...

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  8. The atomic number of an elemtn Z is 9. Which of the following statemen...

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  9. The electronic configuration of Selinium is 2, 8 , 18, 6. Which of us ...

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  10. Which of the following statements about the element X whose atomic num...

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  11. Which of the following statements about an element A whose atomic numb...

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  12. Which of the following statements about an element whose atomic number...

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  13. Which of the following statements is corect about the element which co...

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  14. Valency expresses… total electrons in valence shell of an atom. at...

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  15. Which of the following compounds are covalent ? A) H2 b) Cao c) CHCl3 ...

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  16. Factors effecting the formation of the ionic bond

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  17. Which of the following elements ar electropositive ?a) Sodium b) Potas...

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  18. The following are some statements about the characteristics of covalen...

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  19. What are true about Lewis dot structures of molecules ? Each bond is...

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  20. Sodium atoms and sodium ions

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