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The atomic number of an element X is 16 ...

The atomic number of an element X is 16
(a) Write down the electric configuration of X.
(b) What will be the valency of X ?

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The correct Answer is:
(a) 2,8,6
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
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  2. Write the electronic configuration of the element with atomic number ...

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  3. The atomic number of an element X is 16 (a) Write down the electric ...

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  4. What valencies will be shown by the elements A, B, C, D and E having a...

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  6. Explain why .(1)^(3)H and .(2)^(3)He are not considered isotopes

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  8. What is the reason for the identical chemical properties of all the is...

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  9. What is the reason for the slightly different physical properties of a...

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  10. Explain why, the atomic masses of many elements are in fractions and n...

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  11. Which of the following are isotopes and which are isobars ? Argon, D...

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  12. Hydrogen has three isotopes written as : .(1)^(1)H,.(1)^(2)H,.(1)^(3...

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  13. Given that the percentage abundance of the isotope .(10)^(20)N is 90 %...

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  14. What are isobars ? Explain with an example.

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  15. For the symbol H,D and T tabulate three sub-atomic particles found in ...

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  16. An element has Z = 7. What is the valency of the element ? Also name t...

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  17. (a) What are valence electrons ? Where are valence electrons situated ...

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  18. (a) What are isotopes ? Explain by giving an example (b) Give one si...

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  19. (a) What are radioactive isotopes ? Give two examples of radioactive i...

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  20. (a) Define valency of an element. What valency will be shown by an ele...

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