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Question

On the bombardment of 7N14 with alpha particles, the nucleus of the product after the release of a proton will be


A

8O17

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B

8O18

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C

9F17

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D

9F18

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Solution

The correct option is B

8O18


7N14 + 2He4 X + 1p0

In the above reaction let y be the number of protons of X and z be the mass number of X.

Therefore X can be represented as: yXz

Since total number of protons before and after the reaction will remain same:

Therefore,

7+2=y+1

=> y= 8

Hence X is oxygen

Similarly, the mass number will also be conserved:

Therefore,

14+4=z+0

=>z=18

So X is 8O18


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