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  • A radioactive substance disintegrates as follows <img alt="\mathrm{{ }_{92} X^{234} \longrightarrow{ }_{87} Y^{222}}" src="/latex-image/?%5Cmathrm%7B%7B%20%7D_%7B92%7D%20X%5E%7B234%7D%20%5Clongrigh

A radioactive substance disintegrates as follows \mathrm{{ }_{92} X^{234} \longrightarrow{ }_{87} Y^{222}}. the number of \mathrm{\alpha } and \mathrm{\beta } particles that are emitted in this process are

Option: 1

3,5


Option: 2

5,3


Option: 3

3,3


Option: 4

3,1


Answers (1)

best_answer

decrease in mass number =234-222
                                          =12
This is due to \alpha- particle only

\Rightarrow \text{No. of }\: \alpha \: \text{particle }\frac{12}{4}=3.
due to \alpha particle decrease in atomic number 3\times 2=6

Atomic number becomes 92-6=86 but it is 87, so one \beta particle is emitted also.

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