If N 0 is the original mass of the substance of half-life period t 1-5 years- then the amount of substance left after 15 years isA- N0-08-N0B- N0-16-N0-02D- N0-4

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Physics

Mass Energy Equivalence

If N 0 is the...

Question

If $N_{0}$ is the original mass of the substance of half-life period $t_{\frac{1}{2}}$ = 5 years, then the amount of substance left after 15 years is

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A

15 years is three half lives

Thus, N = $\frac{N_{0}}{2^{3}}$ = $\frac{N_{0}}{8}$

Suggest Corrections

Similar questions

Q. If

N_{0}

is the original mass of the substance of half-life period

t_{1 / 2} = 5

years, then the amount of substance left after 15 years is

Q. If

N_{0}

is the original mass of the substance of half-life period

r_{t / 2} = 5

years, then the amount of substance left over 15 years is _____.

Q. The number of atoms of a radioactive substance of half-life T is

N_{0}

at t = 0. The time necessary to decay from

N_{0} / 2

atoms to

N_{0} / 10

atoms will be

Q. If

N

_{0}

is the original mass of the substance of half life period t

_{1 / 2} =

5

years, then the amount of substance left after

15

years is:

N_o/2 atoms of X(g) are converted into X⁺(g) by energy E₁. N_o/2 atoms of X(g) are converted into X^-(g) by energy E₂. Hence the ionisation potential and electron affinity of X(g) per atom are:

A. 2E₁/N_o., 2(E₂-E₁)/N_o

B. 2E₁/N_o.,. 2E₂/N_o

C. E₁-E₂/N_{o. ,.}2E₂/N_o

D. None is correct

Join BYJU'S Learning Program

If N0 is the original mass of the substance of half-life period t12 = 5 years, then the amount of substance left after 15 years is

The correct option is A 15 years is three half lives Thus, N = N023 = N08

If $N_{0}$ is the original mass of the substance of half-life period $t_{\frac{1}{2}}$ = 5 years, then the amount of substance left after 15 years is

The correct option is A

15 years is three half lives

Thus, N = $\frac{N_{0}}{2^{3}}$ = $\frac{N_{0}}{8}$