A contains two phosphorous radio nuclides- 15 - 33 - P -left- - T - 1-2 -14-3d right- and - 15 - 33 - P -left- - T - 1-2 -25-3d right- - Initially- 10- of the decays come from -T-1-2- How long one must 90- do so-

Question

A contains two phosphorous radio nuclides- 15 - 33 - P -left- - T - 1-2 -14-3d right-  and - 15 - 33 - P -left- - T - 1-2 -25-3d right- - Initially- 10- of the decays come from -T-1-2- How long one must 90- do so-

Toppr Admin · Accepted Answer

A source contains two phosphorous radio nuclides$$_{ 15 }^{ 33 }{ P }\left( { T }_{ 1/2 }=14.3d \right) $$ and $$_{ 15 }^{ 33 }{ P }\left( { T }_{ 1/2 }=25.3d \right) $$. Initially, $$10$$% of the decays come from $${T}_{1/2}$$. How long one must wait until $$90$$% do so?

A source contains two phosphorous radio nuclides
$$_{ 15 }^{ 33 }{ P }\left( { T }_{ 1/2 }=14.3d \right) $$ and $$_{ 15 }^{ 33 }{ P }\left( { T }_{ 1/2 }=25.3d \right) $$. Initially, $$10$$% of the decays come from $${T}_{1/2}$$. How long one must wait until $$90$$% do so?