1.

Bombardment of aluminiumby alpha - particle leads to its artificial disintegration in two way (i) and (ii) as shown.Products X, Y and Z respectively are,

Answer»

proton, neutron, positron
neutron, positron, proton
proton, positron, neutron
positron, proton, neutron

Solution :`._(2)He^(4) +._(13)^(27)Al rarr ._(14)^(30)Si +._(Z)^(A)X`
Applying nuclear charge & mass NUMBER balance `z=1,A=1`
`:. X=rArr ._(1)H^(1)` or `._(1)P^(1)`
`._(15)^(27)Al+._(2)He^(4) rarr ._(15)^(30)P+._(Z)^(A)Y`
Applying nuclear charge and mass number balance Z=0, A=1
`:. Y rArr ._(0)n^(1)`
`._(15)^(30)P rarr ._(14)^(30)Si +Z`
Applying nuclear charge and mass number balance
`Z rArr ._(+1)e^(0)`


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