N = N0 X e ^ (-kb X t)
where:
NO the initial amount = 100
kb is the constant = 0.056
t is the time = 50
I get 6.1 after 50 years.
You can't talk about "the" half-life for most radioactive isotopes, they vary so widely - between a tiny fraction of a second, to trillions of years and more.
200
one sixteenth of the original
If I take a radioactive sample of 400 moles of an unknown substance and let it decay to the point of three half-lives I would have 50 moles left of the sample. 1/2 of what is left will decay in the next half-life. At the end of that half-life I will have 25 moles left of the unknown substance or 4/25.
Polonium is often considered to be the most radioactive element, but there are far more radioactive elements like nobelium and lawrencium. However, the most radioactive elements are man-made like ununtrium and ununseptium. Out of these, ununoctium is the most radioactive but scientists are continuing to make even more radioactive elements today.
The disintegration constant is the fraction of the number of atoms of a radioactive nuclide which decay in unit time; is the symbol for the decay constant in the equation N = Noe^-t, where No is the initial number of atoms present, and N is the number of atoms present after some time (t).
It tells what fraction of a radioactive sample remains after a certain length of time.
A fraction is a numerical constant. Being a fraction does not alter that. And, as a constant, its rate of change is precisely zero.
The fraction that remains is 1/8.
Yes.
It is 1/8 .
Approx 1/8 will remain.
1/8 of the original amount remains.
The force of gravity between two objects is proportional to(mass1) x (mass2)/(distance between them)2 , but it's not equal to that fraction. To get the actual value of the forces, youhave to multiply that fraction by a 'proportionality' constant, and since we'retalking gravity here, the constant is called the Gravitational Constant.If everything in the fraction is in SI (metric) units, then the gravitationalconstant is 6.67 x 10-11newton-meter2/kilogram2 And when you multiply the fraction by that constant, you get the actual valueof the force, in newtons.
You can't talk about "the" half-life for most radioactive isotopes, they vary so widely - between a tiny fraction of a second, to trillions of years and more.
The remainder is 2-p or 0.5p of the original amount.
There will be 1/8 remaining.