Question

The half life of polonium is 140 days. What would be its decay constant?

Answer 1

half life = ln(2)/λ where λ is decay constant
λ=ln(2)÷140 day⁻¹

Answer 2

hello friend...!!!

according to the question we should find the value of decay constant 

it is given that , 

$T_{1/2}$ = 140 days .

we know that ,

$T_{1/2}$ = 0.693 / λ 

where λ denotes decay constant ,

therefore ,

λ = 0 . 693 / 140 

λ = 4.9 x 10⁻³ 

therefore the decay constant is equal to 4.9x10⁻³
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hope it helps....!!