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Atom A has a mass number 209 and atomic ...

Atom A has a mass number 209 and atomic number 82
Atomic B has a mass number 209 and atomic number 83
(i) How many protons atom A has ?
(ii) How many protons atom B has ?
(iii) Are atoms A and B isotope of the same element ?

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The correct Answer is:
(i) 82 (ii) 83 (ii) No
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LAKHMIR SINGH & MANJIT KAUR-STRUCTURE OF ATOM-Exercise
  1. The isotopes of an element contain :

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  2. Which is the number of valence electrons in : (a) sodium ion, Na^(+)...

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  3. Atom A has a mass number 209 and atomic number 82 Atomic B has a mas...

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  4. Which of the following pairs are isotopes ? Give reasons for your choi...

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  5. Three different atoms of oxygen are represented as : .(8)^(16)O,.(8)...

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  6. The atomic species A and B have different number of protons but the sa...

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  7. Composition of the nuclei of two atomic species A and B is given as un...

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  8. Which of the following pairs are isobars ? (i) .(26)^(58)A, .(28)^(5...

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  9. The number of protons, neutrons and electrons in particles A to E are ...

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  10. The composition of two atomic particles is given below : {:(,"X","Y"...

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  11. Four students (A),(B),(C) and (D) observed the colour and solubility o...

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  13. The correct procedure of heating iron-sulphur mixture to prepare iron ...

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  15. The following precautions were listed for the experiment on determinat...

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  17. Four students (A), (B), (C) and (D) independently observed the evapora...

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  18. A student takes a mixture of sand and ammonium chloride in a china dis...

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  19. A student takes some water in a beaker and heats it over a flame for d...

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