Radioactivity was discovered by Henri Becquerel in 1896, while investigating any possible relation between fluorescence and X-rays. A crystal of potassium uranyl sulphate was used as a source of fluorescence material.
On exposure to sunlight, it emitted radiations which could penetrate paper, glass and aluminium sheets and ionise gases. These types of radiations were also abserved in darkness. Nature and origin of these radiation were investigated by Becquerel, Rutherford,
Pierre Curie and Marie Curie. Uranium changed to thorium during the emission of these radiations.
(i) Consider following radioactive transformation:
A : 
⎯→ 
B : 
⎯→ 
C : 
⎯→ 
Types of particles emitted are–
⎯→ 
+ 
+ 
⎯→ 
+ 
+ 3 
⎯→ AlH 3
⎯→ 
4 α , 4 β (iii) Which is not the radioactive change in the following ? 
+ 
⎯→ 
+ 
Text Solution
Verified by Experts7
(i)
Sol. α , β , γ
(ii)
Sol. 7 α , 6 β
(iii)
Sol. 
+ 3 
⎯→ AlH 3
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems