Question

Half life of radium is 1600 yrs. Its average life is

Solution

Correct option is

2304yrs

      

      = 2304yrs.

SIMILAR QUESTIONS

Q1

If the half lives of a radioactive element for α and β decay are 4 yrs and 12 yrs respectively, the ratio of their activities after six yrs will be

Q2

Half life of a radioactive sulistance A is 4 days. The probability that a nucleus will dacay in two half lives is

Q3

The half life of  The time taken for the radioactivity of a sample of  to dacay to 1/6 th  of its initial value is:

Q4

The half life of 131I is 8 days. Give a sample of 131I at time t = o, we can assert that

Q5

The mass of one mole of electrons is

Q6

The increasing order for  the values of e/m is

Q7

The total number of neutrons in dipositive zinc ion with mass number 70 is

Q8

A radioactive nucleus is leing produed at a constant rate  per second. Its decay constant is λ. If No. are the number of nuclei at time t = 0, then  themanimum no, of nuclei

Q9

A radioactive sulestance has a half–life of four months three fourth of thesulestance will decay in

Q10

What percentage of original radioactive atoms is left after four half lives