` 1 mg` of `Th` emits 22 `alpha`-particles per unit solid angle per minute. Calculate `t_(1//2)` or `Th (Th = 232)`.

1 mg of thorium emits 22 alpha- particles per minute per unit solid angle.Calculate average - life of thorium.Atomic weight of thorium-232.

One miligram of thorium emits 22alpha particles per minute per unit solid anlge. Calculate average life of thorium. Atomic weight of Thorium is 232.

In Rutherford's alpha particle cexperiment with thin gold faill, 8100 scattered alpha -particles per unit ara per unit area per minute were observed at an anle of 60^(@) . Find the number of scattered alpha particles pr unit area per minut e at and angle of 120^(@)

In Rutherford's alpha particle cexperiment with thin gold faill, 8100 scattered alpha -particles per unit ara per unit area per minute were observed at an anle of 60^(@) . Find the number of scattered alpha particles pr unit area per minut e at and angle of 120^(@)

The number of alpha particles scattered at 60^(@) is 100 per minute in an alpha particle scattering experiment. Calculate the number of alpha particles scattered per minute at 90^(@) .

In an alpha -particle scattering experiment, the number of particles scattered at an angle of 90^@ is 100 per minute. Calculate the number of particles scattered at an angle of 60^@

What is the alpha - activity in disintigration per minute 1 gm sample of ""^(226)Ra. (t_(1//2) = 1620 " year" )

A U^(238) nucleus , initially at rests , emits an alpha particle with a speed v_(0) . Calculate the recoil speed of the residual nucleus Th^(234) . Assume that the mass of a nucleus is proportional to the mass number. Also , calculate the ratio of K.E. of Th^(234) and alpha -particle.

The number of alpha and beta -particles emitted in the nuclear reaction ._(90)^(210) Th to ._(83)^(212)Bi are:

Thorium isotope ._(90)Th^(232) emits some alpha -particle and some beta -particle and gets transformed into lead isotope ._(82)Pb^(200) . Find the number of alpha -and beta -particles emitted.