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The total number of electrons in a nitro...

The total number of electrons in a nitrogen atom is 7. Find the number of valence electrons in it.

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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. An atom of an element X may be written as .(4)^(9)X What does the fi...

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  2. The electronic configuration of an element Z is 2, 8, 8. (a) What is...

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  3. The total number of electrons in a nitrogen atom is 7. Find the number...

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  4. What is the general name of the elements having 8 electrons in the val...

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  5. Which noble gas has less than 8 electrons in the valence shell of its ...

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  6. State on use of radioactive isotopes in medicine.

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  7. Give one example of a radioactive isotope which is used as a fuel in t...

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  8. Name the ratioactive isotopes which is used in the treatment of cancer...

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  9. Which radioactive isotope is used to determine the activity of thyroid...

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  10. State one use of radioactive isotopes is industry.

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  11. State whether the following statement is true is false : Radioactive...

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  12. What name is given to those atoms which contain the same numer of prot...

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  13. What is the relationship between an atom containing 11 protons, 11 ele...

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  14. What name is given to the pair of atoms such as .(7)^(14) N and .(7)^(...

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  15. What name is given to those isotopes which have unstable nuclei and em...

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  16. Fill in the following blanks in respect of an atom of an element :

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  17. Complete the following statements : (a) Magnesium has 2 valence elec...

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  18. The nucleus of an atom has 5 protons and 6 neutrons. What would be the...

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  19. Write the electronic configuration of the element with atomic number ...

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

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