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

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

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

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

If alpha and beta are the roots of the quadratic equation 2x^2+6x-5=0 , then find (alpha+beta) and alpha xx beta .

If alpha and beta are the roots of equation x^2-4x+1=0 , find alpha^2+beta^2

If alpha and beta are the roots of equation x^2-4x+1=0 , find alpha^3+beta^3

If alpha and beta are the roots of quadratic equation x^2+5x-1=0 then, find alpha^2+beta^2

If alpha and beta are the roots of the quadratic equation x^2-4x-6=0 , find the values of alpha^2 + beta^2