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हिंदी
Home
»
Modern Physics
»
Nuclei
» Question
Nuclei
Easy Questions
Modern Physics
Dual Nature of Radiation and Matter
Atoms
Nuclei
Semiconductor Electronics : Materials, Devices and Simple Circuits
A sample has 4 × 10
16
radioactive nuclei of half life 10 days. The number of atoms decaying in 30 days is
3.9 × 10
16
5 × 10
15
10
16
3.5 × 10
16
Correct Option:
D
N = 4 × 10
16
1
30/10
=
1
× 10
16
2
2
Atoms decayed
= 4 × 10
16
-
1
× 10
16
2
= 3.5 × 10
16
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