The half-life period of radium is 1600 years. Calculate the disintegration of radium.

Explanation

Disintegration constant `lambda = (0.639)/(t_(1//2))`
since, `t_(1//2) = 1600` years
So, `lambda = (0.693)/(1600)`
or `lambda = 4.33 xx 10^(-4) "years"^(-1)`