HALF LIFE AND AVERAGE LIFE

Life time || Half Life time || Average Life time OF a Radioactive Sample || Units OF Radioactivity (Baeyer,Curie,Ratherford)

STATEMENT-1: In radioactivity, the nature of a smaple can be understood by its half life or average life but not by its total life. STATEMENT-2: The total life of any radioactive sample is infinite.

The activity of a nucleus is inversely proportional to its half of average life. Thus, shorter the half life of an element, greater is its radioactivity, i.e., greater the number of atomsd disintegrating per second. The relation between half life and average life is t_(1//2) = (0.693)/(lambda) = tau xx 0.693 or tau = 1.44 t_(1//2) The half-life periods of four isotopes are given 1 = 6.7 years, II = 8000 years, III = 5760 years, IV = 2.35 xx 10^(5) years. Which of these is most stable?

The activity of a nucleus is inversely proportional to its half of average life. Thus, shorter the half life of an element, greater is its radioactivity, i.e., greater the number of atomsd disintegrating per second. The relation between half life and average life is t_(1//2) = (0.693)/(lambda) = tau xx 0.693 or tau = 1.44 t_(1//2) The half-life periods of four isotopes are given 1 = 6.7 years, II = 8000 years, III = 5760 years, IV = 2.35 xx 10^(5) years. Which of these is most stable?

A. Life expectancy is based on average life span. R. It is the age at which half the population still survives.

A. Life expectancy is based on average life span. R. It is the age at which half the population still survives.

Half life of A is same as that of mean life of B

Define half-life period and average life. Derive relation between them.

Assertion In one half-life of a radioactive substance more number of nuclei are decayed than in one average life. Reason Average life = Half -life/in (2)