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  4. When aluminium is bombarded with fast neutrons, it changes into sodium with emission of particle x according to the equation 1327 mathrmAl+ 01 mathrmn arrow 1124 mathrmNa+ mathrmx What is x ?

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Q. When aluminium is bombarded with fast neutrons, it changes into sodium with emission of particle $x$ according to the equation ${ }_{13}^{27} \mathrm{Al}+{ }_0^1 \mathrm{n} \rightarrow{ }_{11}^{24} \mathrm{Na}+\mathrm{x}$

What is $x$ ?

NTA AbhyasNTA Abhyas 2020Nuclei

Solution:

The mass number of $x=27+1-24=4$ and its atomic number $=13+0-11=2.$
Hence particle $x$ is the helium nucleus, which is called an alpha particle