A sample of radioactive element has a ma...

A sample of radioactive element has a mass of `10 g` at an instant `t=0`. The approximate mass of this element in the sample after two mean lives is

2.50 gm

1.35 gm

6.30 gm

3.70 gm

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

NUCLEI
AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION-C)|81 Videos
NUCLEI
AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION-D)|10 Videos
NUCLEI
AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION-A)|40 Videos
MOVING CHARGES AND MAGNETISM
AAKASH INSTITUTE ENGLISH|Exercise Assignment Section J (Aakash Challengers Questions)|5 Videos
OSCILLATIONS
AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section D) (ASSERTION-REASON TYPE QUESTIONS)|13 Videos

Similar Questions

Explore conceptually related problems

A sample of a radioactive element has a mass of 10 g at an instant t=0. The approximate mass of this element in the sample left after two mean lives is

A sample of sodium has a mass of 46g. What is the mass of the same number of calcium atoms as sodium atoms present in given sample ?

A certain radioactive element has a half-life of 20 years . If we have a block with 10 g of the element in it, after how many years will there be just 2.5 gm of element in the block

The activity of a sample of radioactive element X^(100) is 6.02 curie. Its decay constant is 3.7 xx 10^(4) s^(-1) . The initial mass of the sample will be a. 10^(-6) g b. 10^(-8) g c. 10^(-20) g d. 10^(-15) g

A sample of sodium has a mass of 46g. What is the mass of the same number of calcium atoms as sodium atoms present in given sample (a) 46 g (b) 20 g (c) 40 g (d) 80 g

A radioactive sample has 6.0 xx 10^18 active nuclei at a certain instant. How many of these nuclei will still be in the same active state after two half-lives?

If the half lives of a radioactive element for alpha and beta decay are 4 year and 12 years respectively, then the percentage of the element that remains after 12 year will be

A radioactive sample has 8.0xx10^(18) active nuclei at a certain instant. How many of these nuclei will still be in the active state after two half-life ("in" xx10^(18)) ?

The half life a radioactive element is 30 days, if the mass of the specimen reduces to 1//10^(th) then the time taken is :-

AAKASH INSTITUTE ENGLISH-NUCLEI-ASSIGNMENT (SECTION-B)

N atoms of a radioactive element emit n alpha particles per second. Th...
Text Solution
|
90% of the active nuclei present in a radioactive sample are found to ...
Text Solution
|
A sample of radioactive element has a mass of 10 g at an instant t=0. ...
Text Solution
|
During mean life of a radioactive element, the fraction that disintegr...
Text Solution
|
An element A decays into an element C by a two step process A to B + ....
Text Solution
|
After three half lives, the percentage of fraction of amount remain is...
Text Solution
|
The radioactivity of a certain radioactive element drops to 1//64 of i...
Text Solution
|
The half-life of a radioactive substance against alpha-decay is 1.2 xx...
Text Solution
|
The value of binding energy per nucleon is
Text Solution
|
In the nuclear fusion reaction ""(1)^(2)H+""(1)^(3)Hto""(2)^(4)He+""(0...
Text Solution
|
A nucleus ""^(220)X at rest decays emitting an alpha-particle . If ene...
Text Solution
|
Radioactive nuclei P and Q disintegrate into R with half lives 1 month...
Text Solution
|
A radioactive element X emits six alpha-particles and four beta-partic...
Text Solution
|
In nature, ratio of isotopes Boron, ""5B^(10) and ""5B^(11) , is (give...
Text Solution
|
Q -value of the decay ""(11)^(22)Na to ""(10)^(22)Ne+e^(+)+nu is
Text Solution
|
Which of the alternatives gives correct match of columni with column-I...
Text Solution
|
Correct increasing order of penetrating powers of alpha,beta particles...
Text Solution
|
Calculated the energy required to excite one litre of hydrogen gas at ...
Text Solution
|
37 Rutherford equals
Text Solution
|
Which of these is incorrect about nuclear forces ?
Text Solution
|