SATHEE: Nuclei Ques 79

Nuclei Ques 79

The half life of radium is about 1600 years. Of $100 g$ of radium existing now, $25 g$ will remain unchanged after one half-life

[2004]

(a) 3200 years

(b) 4800 years

(c) 6400 years

(d) 2400 years

Show Answer

Answer:

Correct Answer: 79.(a)

Solution:

(a) $100 g$ will become $25 g$ in two half-lives, so, it is 3200 years.

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Nuclei

Nuclei Ques 79

The half life of radium is about 1600 years. Of $100 g$ of radium existing now, $25 g$ will remain unchanged after one half-life

Answer:

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