In the nuclear decay given below: ^ A _ Z X ^ A _ Z+1 Y ^ A-4 _ Z-1 B ^ * ^ A-4 _ Z-1 B the particles emitted in the sequence are:

NEET 2009 Physics question

In the nuclear decay given below:

{}^{A}_{Z}X Y B^{*} B

the particles emitted in the sequence are:

(1)
(2)
(3)
(4)Correct

Answer: (4)

Solution

Step 1: X to Y: mass number unchanged (A), atomic number rises from Z to Z+1, so a neutron changed into a proton, i.e. a beta particle (, an electron) is emitted. Step 2: Y to B*: mass number falls by 4 (A to A-4) and atomic number falls by 2 (Z+1 to Z-1), so an alpha particle

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Question ID VK-090135