. Group displacement law states that the emission of alpha


or beta particles results in the daughter element occupying a position, in the periodic table, either to the left or right of that of the

parent element. Which one of the following alternatives gives the correct position of the daughter element?

A: On emission of alpha particle - 2 groups to the right;On emission of beta particle - 1 group to the right

B: On emission of alpha particle - 2 groups to the right;On emission of beta particle - 1 group to the left

C: On emission of alpha particle - 2 groups to the left;On emission of beta particle - 1 group to the left

D: On emission of alpha particle - 2 groups to the left;On emission of beta particle - 1 group to the right

 

 

Best Answer

Explanation:

We know that,

Alpha emission decreases the atomic number by two. So, on the emission of α-particle daughter element shift 2 group to the left. Beta emission increases the atomic number by one.

So, on the emission of β-particle daughter element shift 1 group to the right.

Final Answer:

Hence, Option D is correct i.e, On emission of alpha particle - 2 groups to the left ; on emission of beta particle - 1 group to the right.

 

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