Fill in the blanks with appropriate items : The half-life period of radioactive element _______ minute if 75% of it disintegrates in 40 min.

Fill in the blanks with appropriate items :
The half-life period of radioactive element _______ minute if 75% of it disintegrates in 40 min.

Monjur Alahi

4 views

2025-01-04 04:42

1 Answers

Salim Ahmed Kawsar

Correct Answer - 20 min.
`t_(3//4)=2t_(1//2)=40 =2t_(1//2) rArr t_(1//2)=20 min`

4 views Answered 2023-02-05 15:29

Related Questions

The half-life period of a radioactive element is `1.4 xx 10^(10)` years. Calculate the time in which the activity of the element is reduced to 90% of

2 Answers 4 Views

The half - line period a radioactive element `X` is same as the mean life time of another radioactive element `Y`. Initially both of them have the sam

2 Answers 5 Views

Two radioactive nuclides A and B have half-lives 50 min and 10 min respectively . A fresh sample contains the nuclides of B to be eight times that of

2 Answers 5 Views

Fill in the blanks with appropriate items : The `alpha` -activity of `1 gm .^(226) Ra. (t_(1//2)=1620 ` year) is _______ dpm.

2 Answers 4 Views

Fill in the blanks with appropriate items : The half life of the nuclide `Rn^(220)` is `54.5 sec`., _______ kg of radon is equivalent to 1 millicurie.

2 Answers 4 Views

Fill in the blanks with appropriate items : A radioactive substance decays 20% in 10 min if at start there are ` 5 xx 10^(20)` atoms present , after _

2 Answers 4 Views

True or False Statements : Half life for certain radioactive element is 15 min. Four nuclei of that element are observed at a certain instant of time.

2 Answers 5 Views

A radioactive substance disintegrates 1/64 of initial value in 60 s. The half-life of this substance is

2 Answers 13 Views

Assertion In one half-life of a radioactive substance more number of nuclei are decayed than in one average life. Reason Average life = Half -life/in

2 Answers 9 Views

At 500 K, the half-life period of a gaseous reaction at the initial pressure of 80 kPa is 350 sec. When the pressure is 40 kPa, the half life period i

2 Answers 7 Views

এক্সাম দিয়ে মেধা যাচাই করুন

Job Preparation (1125)

Admission (754)

এসএসসি (10)

এইচএসসি (5)