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From the symbol .(15)^(31)P, state : ...

From the symbol `._(15)^(31)P`, state :
(i) mass number of phosphorus,
(ii) atomic number of phosphorus and
(iii) electron configuration of phosphorus.

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The correct Answer is:
(i) 31 (ii) 15 (iii) `underset("2, 8, 5")("K L M")`
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
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  2. Which of the following statement is always correct?

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  3. From the symbol .(15)^(31)P, state : (i) mass number of phosphorus,...

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  6. An atom of an element X may be written as .(4)^(9)X What does the fi...

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

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

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

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

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  11. State on use of radioactive isotopes in medicine.

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

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  15. State one use of radioactive isotopes is industry.

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

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

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

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

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

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