The ratio of molecular mass of two radioactive substance is 4-3- If the ratio of their initial activity per mole is considered as x- then 3 x-

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

Byju's Answer

Standard XII

Physics

Characteristics of Bohr's Atomic Model

The ratio of ...

Question

The ratio of molecular mass of two radioactive substance is $\frac{4}{3}$ . If the ratio of their initial activity per mole is considered as x, then 3x = ___ .

Open in App

Solution

Activity $R = λ N$

Number of nuclei (N) per mole are equal for both the substances

$∴ R \propto λ$ or $\frac{R_{1}}{R_{2}} = \frac{λ_{1}}{λ_{2}} = \frac{4}{3}$

Suggest Corrections

Similar questions

The ratio of molecular mass of two radioactive substance is $\frac{3}{2}$ and the ratio of their decay constant is $\frac{4}{3}$ . Then the ratio of their initial activity per mole will be

The ratio of molecular mass of two radioactive substances is $\frac{3}{2}$ and the ratio of their decay constants is $\frac{4}{3}$ .Then the ratio of their activity per mole will be

There are three lumps of a given radioactive substance. Their activity is in the ratio of 1:2:3 now. What will bethe ratio of their activities at any further date?

The masses of two radioactive substance are same and their half lives are 1 hr and 2yr respectively. The ratio of their activities after 4yr will be:

Q. In an experiment on two radioactive isotopes of an element (which do not decay into each other), their molar ratio at a given instant is 3. The rapidly decaying isotope has larger mass and an initial activity of

1.0 μ C i

. The half-lives of the two isotopes are 12 and 16 hr respectively.
Now,if their molar ratio after two days is

N_{A} / N_{B}

,then calculate the value of

4 (N_{A} / N_{B})

will be:

Join BYJU'S Learning Program

The ratio of molecular mass of two radioactive substance is 43 . If the ratio of their initial activity per mole is considered as x, then 3x = ___ .

Activity R=λN Number of nuclei (N) per mole are equal for both the substances ∴ R∝λ or R1R2=λ1λ2=43

The ratio of molecular mass of two radioactive substance is $\frac{4}{3}$ . If the ratio of their initial activity per mole is considered as x, then 3x = ___ .

Activity $R = λ N$

Number of nuclei (N) per mole are equal for both the substances

$∴ R \propto λ$ or $\frac{R_{1}}{R_{2}} = \frac{λ_{1}}{λ_{2}} = \frac{4}{3}$