Unstable nuclei attain stability through disintergration. The nuclear stability is related to neutron- proton ratio (n//p).n//p ratio for stable nuclei lies quite close to unity for elements with low atomic numbers (20 or less) but it is more than one for nuclei having higher atomic numbers. Nuclei having n//p ratio either very high or low undergo nuclear transformation. (i) When n//p ratio is higher than required for stability, the nuclei have the tendency to emit beta-rays, i.e. a neutron is converted into a proton. (ii) When n//p ratio is lower than required for stability, the nuclei increase the ratio, either by emitting alpha-particleor by emitting a positron or by K-electron capture. ""_(13)^(27)Al is a stable isotope , ""_(13)^(29)Al is expected to disintegrate by-

Unstable nuclei attain stability through disintergration. The nuclear

1.	Unstable nuclei attain stability through disintergration. The nuclear stability is related to neutron- proton ratio (n//p).n//p ratio for stable nuclei lies quite close to unity for elements with low atomic numbers (20 or less) but it is more than one for nuclei having higher atomic numbers. Nuclei having n//p ratio either very high or low undergo nuclear transformation. (i) When n//p ratio is higher than required for stability, the nuclei have the tendency to emit beta-rays, i.e. a neutron is converted into a proton. (ii) When n//p ratio is lower than required for stability, the nuclei increase the ratio, either by emitting alpha-particleor by emitting a positron or by K-electron capture. ""_(13)^(27)Al is a stable isotope , ""_(13)^(29)Al is expected to disintegrate by-
Answer» `ALPHA`-EMISSION `BETA`-emission positron emission proton emission Answer :B