How many `alfa` and `beta-` particles are emitted in the transmulation`._90^232Th rarr _82^208Pb`

The number of a particles emitted by ._84^218Ra in changing to stable isotope ._82^206Pb is

Atomic mass of thorium is 232 and 1 ts atomic number 90.The number of a particle and beta particles which will be lost so that an isotope of lead (atomic mass 208 and atomic number 82) is produced is

90 Th^ 232 emits 'X' alpha particles and 'Y' beta particles in succession and is converted into "_82 Pb^ 200 , find 'X' and 'Y'.

Calculate the energy realesed in the following reactions, given the masses to be _88^223 Ra : 223.0185u, "_82 ^209 Pb: 208.9811 , "_6 ^ 14 C: 14.00324 , "_92 ^236 U:236.0456 , "_56 ^140 Ba:139.9106 , "_36 ^94 Kr :93.9341, _6 ^ 11C:11.01143 , "_5 ^ 11 B:11.0093 . ignore neutrino energy. "_88 ^223 Ra rarr "_82 ^209 Pb + "_6 ^ 4 C