PDF chapter test TRY NOW
1. Arrange in descending order, on the basis of their penetration power:
Alpha rays, beta rays, gamma rays, cosmic rays
\(>\) \(>\) \(>\)
2. Arrange the following in the chronological order of discovery:
\(\)
\(\)
Nuclear reactor, radioactivity, artificial radioactivity, discovery of radium
(i)
(ii)
(iii)
(iv)
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