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Q.

Rn86222 is an isotope of noble gas Radon. The number of  protons, neutrons and electrons present in it are


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a

86;86;136

b

86;136;86

c

136;86;86

answer is C.

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Detailed Solution

detailed_solution_thumbnail
Rn86222 is an isotope of noble gas Radon. The number of  protons, neutrons and electrons present in it are 86, 136 and 86 respectively.
Given are the atomic number of Rn = 86, mass number of Rn = 222
We know that number of protons is = 86
Number of electrons = Number of protons
⇒86
Number of neutrons=(Mass Number)-(Atomic Number) ⇒222-86
⇒136
  
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